Quantum Computing
Quantum Computing news — Thursday 08 October 2026
150 stories from 3 sources, every one in English. Each links to its publisher.
-
Patenting Quantum Computing Innovations – Part 5: Shor’s Algorithm and Conclusions
Quantum Computing Report
In part five of our five part series on quantum patents, Sinan Utku discusses why an attempt to patent Shor's algorithm would likely be challenged. The article concludes with an observation about the uncertain state of patent eligibility…
-
U.S. Department of Energy Unveils Quantum Genesis Priority Applications to Guide Fault-Tolerant Scientific Utility
Quantum Computing Report
The U.S. Department of Energy (DOE) Office of Science has released the Quantum Genesis Priority Applications (QGPAs), outlining eight key scientific problems to assess the relevance of fault-tolerant quantum computers. This framework…
-
DOE Announces Science Applications For Quantum Computing
The Quantum Insider
Insider Brief The Department of Energy released eight Quantum Genesis Priority Applications to guide the development and evaluation of fault-tolerant quantum computers for scientific use. The applications span chemistry, materials…
-
U.S. Department of Energy Allocates $159 Million in Phase II Genesis Mission Awards for Quantum Error Correction and Materials Co-Design
Quantum Computing Report
The U.S. Department of Energy has awarded $159 million in Phase II Genesis Mission awards to 12 projects. These projects focus on quantum error correction, materials co-design, and custom microelectronics, leveraging AI and…
-
NVIDIA Commits $1 Billion over Five Years to Accelerate U.S. Scientific Computing and Quantum Infrastructure
Quantum Computing Report
NVIDIA is investing $1 billion over five years to advance U.S. scientific computing and quantum infrastructure. This commitment supports research institutions, cloud providers, and national laboratories, focusing on hybrid…
-
U.S. Department of War Announces $350 Million Quantum Package, Highlighted by $150 Million OSC Loan Commitment for PsiQuantum
Quantum Computing Report
PsiQuantum has secured a conditional loan commitment of up to $150 million from the U.S. Office of Strategic Capital to expand its PsiFactory in Milpitas, California. This funding will support the development of a domestic supply chain for…
-
India’s MeitY Sanctions ₹99.94 Crore ($10.3 Million USD) for IIT Madras and izmo Microsystems Silicon Photonics Program
Quantum Computing Report
India's MeitY has sanctioned ₹99.94 crore (approx. $10.3 million USD) for Phase II of the SPECTRA program at IIT Madras, in partnership with izmo Microsystems. This five-year initiative focuses on developing silicon photonics for…
-
Oratomic Raises $775 Million to Develop Fault-Tolerant Quantum Computers
The Quantum Insider
Insider Brief Oratomic has raised $775 million in total funding since its launch in March 2026 to develop utility-scale, fault-tolerant quantum computers. The financing was led by ARCH Venture Partners, Spark Capital, Khosla Ventures…
-
NTT DOCOMO BUSINESS and Classiq Partner on Enterprise Quantum Computing in Japan
The Quantum Insider
Insider Brief NTT DOCOMO BUSINESS and Classiq Technologies have signed an MoU to support enterprise adoption of quantum computing in Japan. NTT DOCOMO BUSINESS will propose and sell <a…
-
Quantum Source Introduces Memory-Assisted Photonic Interconnect to Unify Multi-Modal Quantum Computing
Quantum Computing Report
Quantum Source has introduced QS-LINK, a memory-assisted photonic interconnect that unifies multi-modal quantum computing. This technology overcomes scaling limitations in multi-processor quantum networks by using a single cavity-trapped…
-
Universal Quantum Closes $100 Million Series A to Accelerate Modular Trapped-Ion Architecture Scaling
Quantum Computing Report
Universal Quantum, a UK-based hardware developer specializing in trapped-ion quantum processors, has successfully closed a $100 million Series A funding round. This investment will fuel their international expansion, including operations…
-
NVIDIA Commits $1 Billion to U.S. Science and Quantum Computing
The Quantum Insider
Insider Brief NVIDIA plans to commit $1 billion over five years to support super intelligence research and development in the U.S., including quantum computing, healthcare and energy. The funding will support higher-education research…
-
Neutral-Atom Developer Oratomic Secures $775 Million in Cumulative Funding for Fault-Tolerant System R＆D
Quantum Computing Report
Oratomic, a Pasadena-based quantum hardware developer, has secured $775 million in cumulative funding to advance its fault-tolerant quantum computing systems. The company focuses on neutral-atom arrays and quantum error correction, aiming…
-
PsiQuantum Receives Conditional $150M Loan Commitment From U.S. Department of War
The Quantum Insider
Insider Brief PsiQuantum has received a conditional commitment for a loan of up to $150 million from the U.S. Department of War’s Office of Strategic Capital. The proposed financing would expand PsiQuantum ’s manufacturing and prototyping…
-
NSF Launches New Programs for Quantum Innovation and STEM Research
The Quantum Insider
Insider Brief The U.S. National Science Foundation is launching new programs focused on scientific research, quantum innovation, advanced computing, and STEM workforce development. NSF will establish an Office of Metascience and launch two…
-
Quantum Source’s QS-LINK Uses a Single Atom to Help Quantum Processors Connect
The Quantum Insider
Insider Brief Quantum Source unveiled QS-LINK, a proposed interconnect that uses a single rubidium atom as quantum memory to link quantum processors without requiring their photons to arrive simultaneously. The design could connect…
-
Energy Department Announces New Genesis Mission Awards to Accelerate Scientific Capability
The Quantum Insider
Insider Brief The Department of Energy announced $159 million for 12 new Phase II Genesis Mission projects using AI and advanced computing to accelerate scientific research. The projects include Harvard -led quantum computing error…
-
Surfshark Adds ML-DSA Authentication to Post-Quantum WireGuard
The Quantum Insider
Insider Brief Surfshark has added ML-DSA-based certificate authentication to its WireGuard implementation, completing its stated full post-quantum security architecture. The company combines ML-DSA authentication with previously added…
-
Project Eleven and Quantus Plan Integration for Institutional Custody
The Quantum Insider
Insider Brief Project Eleven and Quantus plan to integrate the Quantus Network with <a href="https://app.thequantuminsider.com/company/655e2eb0-d994-4f8f-8fbb-0d23b09cfab4/profile" data-tqi-id="655e2eb0-d994-4f8f-8fbb-0d23b09cfab4"…
-
Building codes with transversal CCZ using projective geometry and SAT solvers
arXiv quant-ph
arXiv:2610.09341v1 Announce Type: new Abstract: We construct CSS codes with three logical qubits whose logical CCZ gate is implemented by transversal physical $T/T^{\dagger}$ gates and whose distance is at least $3$. These codes start with…
-
Distance Structure of Insertion Kernels and Local Port Response in Non-Reciprocal Su--Schrieffer--Heeger Chains
arXiv quant-ph
arXiv:2610.09387v1 Announce Type: new Abstract: Non-reciprocal lattices offer a flexible setting for directional wave transport, raising the question of how enhanced internal scattering translates into transmission between fixed external…
-
Vibrational Sample-Based Quantum Diagonalization with Unitary-Cluster-Jastrow Ans\"atze on IBM QPUs
arXiv quant-ph
arXiv:2610.09532v1 Announce Type: new Abstract: We extend sample-based quantum diagonalization (SQD) to anharmonic vibrational spectra and use it to benchmark how vibrational ans\"atze scale on present-day hardware under a direct one-hot…
-
Geodesic-based optimal control for leakage suppression in superconducting qubits
arXiv quant-ph
arXiv:2610.09666v1 Announce Type: new Abstract: Superconducting qubits are often based on the first two energy levels of a physical anharmonic LC oscillator. Since the anharmonicity of such systems is usually much lower than the involved…
-
Automated reduction of fault-tolerant circuits
arXiv quant-ph
arXiv:2610.09749v1 Announce Type: new Abstract: We present an automated method for reducing fault-tolerant circuits through fault-equivalent rewrites. Starting from a known fault-tolerant circuit, the search applies non-reducing enabling…
-
Mixed States in Quantum Rabin Oblivious Transfer
arXiv quant-ph
arXiv:2610.09796v1 Announce Type: new Abstract: Oblivious transfer (OT) is a fundamental cryptographic primitive that is useful for realizing any two-party computation. Since information-theoretically secure perfect OT is impossible…
-
Path Complementarity Enables Directional Quantum Light in Hybridized Cavity Polaritons
arXiv quant-ph
arXiv:2610.09893v1 Announce Type: new Abstract: Directional quantum light requires asymmetric photon statistics without sacrificing coherence between propagation paths, a combination that remains difficult to achieve within a single…
-
Extensively degenerate superradiant phase in a giant-atom quantum Rabi ring
arXiv quant-ph
arXiv:2610.09880v1 Announce Type: new Abstract: We show that an $N$-site quantum Rabi ring with matched giant-atom couplings has $2^N$ degenerate superradiant configurations as the atomic-to-cavity frequency ratio $\eta=\Delta/\omega$…
-
Sufficient quantum provenance: retained fields and certified recording precision
arXiv quant-ph
arXiv:2610.09931v1 Announce Type: new Abstract: Which execution details must a quantum computation retain, and to what precision, to support a declared comparison? We define a sufficient record by the largest Hellinger distance between…
-
On the Expressive Power and Capacity of Quantum Data Reuploaders
arXiv quant-ph
arXiv:2610.09947v1 Announce Type: new Abstract: Data reuploading---repeatedly encoding classical inputs at multiple layers of a parameterized quantum circuit---is a central mechanism for enhancing the expressivity of quantum neural…
-
Moment Methods for Uniform Average Mixing on Strongly Regular Graphs
arXiv quant-ph
arXiv:2610.10017v1 Announce Type: new Abstract: We study continuous-time quantum walks on connected strongly regular graphs that are not complete, observed at a random time drawn from a freely chosen probability law. Uniform average mixing…
-
Can we make sense out of negative kinetic energy?
arXiv quant-ph
arXiv:2610.10040v1 Announce Type: new Abstract: Many Quantum Field Theory models, either designed to improve the ultraviolet behavior via higher derivative terms or aimed at providing unified descriptions of Gravity, inevitably introduce…
-
Inequivalent Quantum Resources from Multipartite State Discrimination
arXiv quant-ph
arXiv:2610.10143v1 Announce Type: new Abstract: Any two orthogonal quantum states can be perfectly distinguished via local operations and classical communication (LOCC), yet whether all orthogonal multipartite pairs incur an identical…
-
Engineering of Chirped Apodized Sources for Quantum Spectroscopy
arXiv quant-ph
arXiv:2610.10217v1 Announce Type: new Abstract: Quantum sources of light are of paramount importance for the development of photonic quantum technologies. The growing demand for bright, efficient, and spectrally engineered photonic sources…
-
An Explicit Counterexample to Tsirelson's Problem via a Linear System Game
arXiv quant-ph
arXiv:2610.10248v1 Announce Type: new Abstract: We construct an explicit binary linear system game that separates \(C_{qa}\), the closure of the set of finite dimensional quantum correlations, from \(C_{qc}\), the set of commuting operator…
-
Binary Optimization of Measurement Groupings for Quantum Energy Estimation
arXiv quant-ph
arXiv:2610.10339v1 Announce Type: new Abstract: Repeated measurements can dominate the resources required for quantum energy estimation, making the choice of which Pauli observables to measure together a central optimization problem for…
-
Quantum simulation of the Heisenberg XXZ model on a Rydberg atom array
arXiv quant-ph
arXiv:2610.10357v1 Announce Type: new Abstract: A major application of analog quantum hardware is quantum simulation, where a system evolves over time according to a given Hamiltonian. One challenge when implementing the Hamiltonian on a…
-
CV-QKD with noisy coherent states and realistic displacement receivers
arXiv quant-ph
arXiv:2610.10414v1 Announce Type: new Abstract: Near-optimal binary coherent state discrimination can be achieved by performing a displacement operation followed by photon detection. This displacement serves as a control parameter that can…
-
Design-Time Conformance Checking for Pulse-Level Quantum Control
arXiv quant-ph
arXiv:2610.10427v1 Announce Type: new Abstract: A pulse-level quantum control program is written against a device whose limits are recorded, if at all, in vendor documentation and source code. A program that exceeds them can be refused at…
-
Dynamically protected erasure qubit via low-frequency charge driving
arXiv quant-ph
arXiv:2610.10432v1 Announce Type: new Abstract: Dynamical protection via strong driving can enable resilient quantum processing on imperfect physical hardware. However, the practical utility of such schemes is frequently limited by…
-
Optimized discrete Wigner representations and non-stabilizerness in qubit systems
arXiv quant-ph
arXiv:2610.10471v1 Announce Type: new Abstract: The apparent absence of a stabilizer-speci?c phase-space description for qubit systems is not fundamental, but arises from ?xing a state-independent discrete Wigner map. Allowing the…
-
The Differential Structure of Generators of KMS-Symmetric Quantum Markov Semigroups
arXiv quant-ph
arXiv:2610.09678v1 Announce Type: cross Abstract: A KMS-symmetric quantum Markov semigroup is completely determined by the quadratic form in induces on the GNS Hilbert space. The quadratic forms that arise in this way are called quantum…
-
Spacetime Quasicrystals and Computational Complexity Theory in the Road Towards Quantum Gravity
arXiv quant-ph
arXiv:2610.09855v1 Announce Type: cross Abstract: Part I: Semiclassical Gravity Efficiently Solves $\mathsf{NP}$-Complete Problems Assuming the gravitational field is classical and that it couples to quantum fields via the semiclassical…
-
QuSema: Detecting Silent Bugs in Quantum Libraries via Quantum-knowledge-enhanced Agents
arXiv quant-ph
arXiv:2610.10258v1 Announce Type: cross Abstract: Quantum libraries are now critical infrastructure for quantum algorithm development, yet their correctness remains difficult to test. Existing testing techniques mainly rely on…
-
Black hole radial geometry from a quantum spin chain
arXiv quant-ph
arXiv:2610.10504v1 Announce Type: cross Abstract: We show that the radial differential equation for a scalar field in an anti-de Sitter black brane background can be encoded in an exactly solvable semi-infinite spin chain independent of…
-
Quantum Spectral Clustering Framework via Compact Circuit Structures
arXiv quant-ph
arXiv:2309.04465v3 Announce Type: replace Abstract: Spectral machine learning methods based on spectral graph theory are powerful but scale poorly due to costly eigen-analysis. Although various eigenvector approximation methods have been…
-
Quantum probability for statisticians; some new ideas
arXiv quant-ph
arXiv:2503.02658v4 Announce Type: replace Abstract: It is argued from several points of view that quantum probabilities might play a role in statistical settings. New approaches toward quantum foundations have postulates that appear to be…
-
Quantum computation with the eigenstate thermalization hypothesis instead of wavefunction preparation
arXiv quant-ph
arXiv:2504.19185v3 Announce Type: replace Abstract: It is proposed that the ability for a quantum circuit to thermalize under time evolution is a valid way to compute linear algebra problems. The algorithm makes use of the eigenstate…
-
Black hole/quantum machine learning correspondence
arXiv quant-ph
arXiv:2506.09678v2 Announce Type: replace Abstract: We explore a possible connection between the black hole information paradox and interpolation geometry underlying the double descent phenomenon in quantum machine learning…
-
Rare Event Simulation of Quantum Error-Correcting Circuits
arXiv quant-ph
arXiv:2509.13678v3 Announce Type: replace Abstract: We describe a practical approach for accessing the logical failure rates of quantum error-correcting (QEC) circuits under low physical (component) failure rate regimes. Standard Monte…
-
Using the wavelet transform to separate scales in the Schr\"odinger equation and subsequently derive the Boltzmann equation
arXiv quant-ph
arXiv:2511.21601v2 Announce Type: replace Abstract: Here we continue our investigation aimed at the derivation of the Boltzmann equation from the first principles of quantum mechanics. The key difficulty that we overcome in this manuscript…
-
Spectrally Robust Photon-Pair Generation in Topological Waveguide Arrays
arXiv quant-ph
arXiv:2510.23796v2 Announce Type: replace Abstract: Harnessing topological effects offers a route to protect quantum states of light from imperfections, potentially enabling more robust platforms for quantum information processing. This…
-
Combatting noise in near-term quantum data centres
arXiv quant-ph
arXiv:2601.14845v2 Announce Type: replace Abstract: We analyse the performance of different error handling methods in the quantum data centre paradigm of distributed quantum computing. We compare the impact of quantum error detection…
-
How to Classically Verify a Quantum Cat without Killing It
arXiv quant-ph
arXiv:2602.09282v2 Announce Type: replace Abstract: A quantum verifier decides membership in QMA using a (single) quantum witness state. This witness may be arbitrary, and no requirement is placed on it beyond its acceptance probability. A…
-
Efficient evaluation of fundamental sensitivity limits and full counting statistics for continuously monitored Gaussian quantum systems
arXiv quant-ph
arXiv:2602.23304v2 Announce Type: replace Abstract: Generalized master equations (GMEs)---time-local but generally neither trace-preserving nor Hermiticity-preserving---are convenient tools to compute properties of the environment of an…
-
Semiclassical Phase-Space Dynamics of Emitter Ensembles with Local Dissipation
arXiv quant-ph
arXiv:2602.14025v4 Announce Type: replace Abstract: We establish that permutation-invariant emitter ensembles with local dissipation admit a semiclassical description on the four-dimensional phase space of a variable-length collective…
-
Product Weyl--Heisenberg covariant mutually unbiased bases and extremal non-stabilizerness
arXiv quant-ph
arXiv:2603.15550v2 Announce Type: replace Abstract: Discrete structures in product Hilbert spaces are investigated. For monopartite systems of size $d$ one relies on the Weyl--Heisenberg group $WH(d)$, while in the case of composite…
-
Post-Quantum Cryptography from Quantum Stabilizer Decoding
arXiv quant-ph
arXiv:2603.19110v2 Announce Type: replace Abstract: Post-quantum cryptography currently rests on a small number of hardness assumptions, posing significant risks should any one of them be compromised. This vulnerability motivates the…
-
Blind Catalytic Quantum Error Correction: Target-State Estimation and Fidelity Recovery Without A Priori Knowledge
arXiv quant-ph
arXiv:2604.11857v4 Announce Type: replace Abstract: Catalytic quantum error correction (CQEC) amplifies residual coherence with a reusable catalyst, giving threshold-free recovery whenever the target coherent modes survive in the noisy…
-
Dynamical $\mathbb{Z}_{2}$ Skin Channels and Effective Loschmidt Cusps
arXiv quant-ph
arXiv:2604.12450v3 Announce Type: replace Abstract: We analytically describe the dynamically separated $\mathbb{Z}_{2}$ skin channels (wavepacket evolutions) under periodic boundary condition (PBC) in non-Hermitian systems with anomalous…
-
dqc_simulator: an easy-to-use distributed quantum computing simulator
arXiv quant-ph
arXiv:2604.13909v2 Announce Type: replace Abstract: Distributed quantum computing (DQC) is a promising proposal for overcoming the scalability challenges of quantum computing. However, the evaluation of DQC hardware and software is…
-
Learning shape resonances from the stabilization method
arXiv quant-ph
arXiv:2605.28437v2 Announce Type: replace Abstract: Resonances in quantum mechanics are commonly introduced as quasi-bound states embedded in the continuum, a perspective that can be conceptually challenging due to the abstract nature of…
-
Nielsen complexity with multiple cost factors
arXiv quant-ph
arXiv:2606.02817v3 Announce Type: replace Abstract: We investigate Nielsen's geometric approach to quantum complexity in the presence of multiple cost factors, extending the standard framework where a single penalty distinguishes easy from…
-
Revivals of Bell nonlocality require Schr\"odinger and Heisenberg non-Markovianity
arXiv quant-ph
arXiv:2606.30745v2 Announce Type: replace Abstract: Bell nonlocality is a key resource in quantum information, demonstrating the nonclassicality of quantum theory. Noise, however, is in general detrimental to nonlocality, and can cause the…
-
On the Born rule in a new quantum approach
arXiv quant-ph
arXiv:2609.24269v5 Announce Type: replace Abstract: In the context of a new approach towards quantum foundation, the Born rule is proved under weak conditions through several steps. Some of the steps turn out to have connections to…
-
Localized Decoherence as a Constructive Tool: An Optical Simulation of Matter-Wave Interference
arXiv quant-ph
arXiv:2609.25227v2 Announce Type: replace Abstract: Decoherence is conventionally regarded as a detrimental process that suppresses quantum coherence and limits the performance of quantum technologies. Contrary to this view, we show that…
-
Strict non-tightness of the level-3 quantum bootstrap for a natural three-dimensional Hamiltonian, at an excited level
arXiv quant-ph
arXiv:2610.03362v2 Announce Type: replace Abstract: For the coupled three-dimensional double well $H=\tfrac12|p|^2+2\sum_i(q_i^2-1)^2-\sum_{i
-
Tensor invariants for multipartite entanglement classification
arXiv quant-ph
arXiv:2604.02269v4 Announce Type: replace-cross Abstract: Organising the space of entanglement structures of a multipartite quantum system is a much more challenging task than its bipartite version: while the local unitary (LU) orbit of a…
-
Multivariable Painleve'-II equation: connection formulas for arbitrary system size
arXiv quant-ph
arXiv:2609.14996v3 Announce Type: replace-cross Abstract: Connection formulas for the asymptotic solutions of a system of n> 1 coupled Painleve'-II equations with symmetry-breaking parameters are written explicitly. An asymptotically exact…
-
Vacancy aggregation enhances NV- spin coherence in diamond: a cluster-correlation-expansion study of multi-vacancy spin baths in semiconductors
arXiv quant-ph
arXiv:2609.24295v2 Announce Type: replace-cross Abstract: Annealing a semiconductor makes its vacancies mobile; they aggregate into multi-vacancy complexes that often carry spin. Such centres are a magnetic-noise source for any spin qubit…
-
Reduced scaling implementation of the coupled cluster-based static embedding method, MPCC with density fitting
arXiv quant-ph
arXiv:2609.32884v2 Announce Type: replace-cross Abstract: An improved algorithm to implement our previously proposed static quantum embedding method MPCC (J. Chem. Phys. 161, 164107 (2024)) is presented. It uses the density-fitting (DF)…
-
Beyond Pure Dephasing: Quantum Error Correction in Single Molecules Requires Multiple Spins
arXiv quant-ph
arXiv:2610.03318v2 Announce Type: replace-cross Abstract: We propose multi-spin molecules as a viable architecture for fault-tolerant quantum computing. To this aim, we introduce a correction protocol handling both diagonal and…
-
The ALPS project release 3.0: open source software for strongly correlated systems
arXiv quant-ph
arXiv:2610.03884v2 Announce Type: replace-cross Abstract: We present release 3.0 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an open-source software project to develop libraries and application programs for the…
-
Correspondence between Asymptotic Quantum Many-Body Scars in Closed Systems and Diffusive Nambu-Goldstone Modes in Open Systems
arXiv quant-ph
arXiv:2610.09662v1 Announce Type: cross Abstract: Hydrodynamic relaxation in open quantum many-body systems can be understood in terms of diffusive Nambu--Goldstone (NG) modes associated with strong-to-weak spontaneous symmetry breaking…
-
What a Reporting Convention Hides: A Matched-Budget Audit of Quantum Natural Gradient with an Exactly Computed Metric
arXiv quant-ph
arXiv:2610.09425v1 Announce Type: cross Abstract: Several published comparisons of variational quantum optimizers time only runs that reach a target loss, or read the verdict at a single target. Either convention could decide whether an…
-
QLIF-CAST: Quantum Leaky-Integrate-and-Fire for Time-Series Weather Forecasting
arXiv quant-ph
arXiv:2605.18333v3 Announce Type: replace Abstract: Accurate and efficient time-series forecasting remains a challenging problem for both classical and quantum neural architectures, particularly in multivariate environmental settings. This…
-
Particle-Number-Preserving Quantum Signal Processing for Thermal Properties: Canonical-Ensemble Estimation and Grand-Canonical Reconstruction
arXiv quant-ph
arXiv:2610.09373v1 Announce Type: new Abstract: We develop an end-to-end framework for estimating canonical thermal properties of particle-number-conserving second-quantized Hamiltonians using quantum simulations. The framework integrates…
-
Non-Hermitian Cooperation Induced Chern Insulator
arXiv quant-ph
arXiv:2610.09413v1 Announce Type: new Abstract: Conventional Chern insulators rely on breaking time-reversal symmetry via magnetic fields or synthetic gauge fields. Here we introduce a fundamentally different paradigm: a static lattice…
-
Quantum Approximation Complexity of Classical Optimization Problems
arXiv quant-ph
arXiv:2610.09584v1 Announce Type: new Abstract: Classical approximation complexity asks what solution quality can be guaranteed with polynomial-time computation. The classes APX, PTAS, and FPTAS distinguish a fixed approximation ratio…
-
Q-PhotoMarket: A Design Space Exploration Framework for Photonic Hybrid Quantum Neural Networks in Financial Market Prediction
arXiv quant-ph
arXiv:2610.09641v1 Announce Type: new Abstract: Photonic quantum computing has recently emerged as a promising platform for hybrid quantum machine learning due to its native realization of linear-optical circuits and the computational…
-
A Minimal Bicomplex Extension of the Complex Scalar Algebra of Quantum Mechanics with an Ideal-Valued Sector
arXiv quant-ph
arXiv:2610.09747v1 Announce Type: new Abstract: Standard quantum mechanics takes the complex numbers as its scalar algebra. We ask whether this complex structure is algebraically fundamental or may instead form a distinguished embedded…
-
Benchmarking Modular Optimization Strategies for Parameterized Quantum Circuits
arXiv quant-ph
arXiv:2610.10254v1 Announce Type: new Abstract: Training parameterized quantum circuits requires balancing optimization progress with limited evaluation budgets and the statistical uncertainty of near-term quantum hardware. We present a…
-
Quantum Readout Complexity for Normalized Linear Functionals
arXiv quant-ph
arXiv:2610.08890v1 Announce Type: new Abstract: Quantum numerical algorithms often encode a positive solution $q$ in the amplitudes of a quantum state, while the required scientific output is a normalized linear functional of $q$. Basis…
-
Teleportation of a programmable gate
arXiv quant-ph
arXiv:2610.09022v1 Announce Type: new Abstract: Alice and Bob each have a qubit, and they would like to perform a two-qubit gate on them with the assistance of Charlie. The action of this gate depends on a parameter, which either Charlie…
-
Cross-Validation of Open-Source Quantum Network Simulators
arXiv quant-ph
arXiv:2610.09322v1 Announce Type: new Abstract: We present a comparative analysis of two open-source quantum network simulators, QuISP and SeQUeNCe, focusing on cross-validation of basic networking tasks to ensure consistency and accuracy…
-
Sample-based quantum simulation of vibrational structure of polyyne chains
arXiv quant-ph
arXiv:2610.09616v1 Announce Type: new Abstract: Predicting anharmonic vibrational spectra is a complex computational task, which becomes quickly infeasible as molecular size and the number of vibrational basis functions increase, leading…
-
Exploring topology via momentum-selective tomography
arXiv quant-ph
arXiv:2610.09673v1 Announce Type: new Abstract: Identifying and measuring topological invariants remains a fundamental challenge due to the non-local nature of momentum eigenstates in real space. Established approaches based on Bloch…
-
Coherent consensus for the estimation and classification of phases
arXiv quant-ph
arXiv:2610.09865v1 Announce Type: new Abstract: Inspired by quantum metrology, we propose a coherent consensus primitive to enhance the collaborative performance of independent quantum classifiers at the decision boundary. The basic idea…
-
Beyond Spectroscopic Strong Coupling: Operational Benchmarks for Cavity-to-Magnon Quantum Transfer
arXiv quant-ph
arXiv:2610.09921v1 Announce Type: new Abstract: Normal-mode splitting reveals coherent cavity--magnon hybridization but does not certify finite-time quantum-state transfer. We describe quantum transfer in a passive, linear cavity--magnon…
-
Zero Mode Operators and Charge-Conjugation Defects in Non-Abelian Fractional Quantum Hall-Superconductor Heterostructures
arXiv quant-ph
arXiv:2610.08907v1 Announce Type: cross Abstract: We study zero modes bound to charge-conjugation defects in fractional quantum Hall-superconductor (FQH-SC) heterostructures built from Abelian and non-Abelian FQH states. Although the…
-
Standard estimators cannot represent fault-tolerant workloads at measured error rates: evaluated, evidence-based uncertainty for quantum resource estimation
arXiv quant-ph
arXiv:2610.10490v1 Announce Type: new Abstract: Estimates of the quantum resources needed to run fault-tolerant algorithms are almost always reported as single numbers, even though they rest on uncertain hardware parameters and on cost…
-
Sub-shot-noise mid-infrared photothermal measurements using twin beams
arXiv quant-ph
arXiv:2610.10294v1 Announce Type: cross Abstract: Mid-infrared photothermal (MIP) measurement probes refractive-index changes induced by mid-infrared (MIR) absorption using visible or near-infrared light and has recently emerged as a…
-
Decentralized Consensus from Quantum Proof of Position
arXiv quant-ph
arXiv:2602.22195v3 Announce Type: replace Abstract: We construct an energy efficient consensus protocol with geospatial position as an external resource by using quantum computers. Economic resources of some form are essential in…
-
Schr\"odinger and Heisenberg non-Markovianity in quantum information tasks
arXiv quant-ph
arXiv:2606.30751v2 Announce Type: replace Abstract: Quantum non-Markovianity has been widely studied and connected to the existence of memory effects in the dynamics of open systems. Surprisingly, working in the Schr\"odinger or in the…
-
Nanophotonic quantum magnetometry in a spin-dense diamond cavity
arXiv quant-ph
arXiv:2511.19831v2 Announce Type: replace-cross Abstract: Quantum sensors based on the nitrogen-vacancy (NV) center in diamond are leading platforms for high-sensitivity magnetometry with nanometer-scale resolution. State-of-the-art…
-
Multipartite entanglement hidden in vector-chiral correlations of spin-1/2 chains
arXiv quant-ph
arXiv:2609.39258v2 Announce Type: replace-cross Abstract: Characterizing entanglement in quantum materials through experimentally accessible observables remains a central challenge. Quantum Fisher information associated with sums of…
-
Contact geometry and sharp degree costs of quantum Bell certificates
arXiv quant-ph
arXiv:2609.10162v2 Announce Type: replace Abstract: The degree needed to certify a quantum Bell bound can diverge evenwhen a fixed-degree unrestricted certificate exists. We identify the geometry of optimal-strategy contacts as the source…
-
Tradeoff between Wigner negativity and decoherence time for cubic Gaussian states
arXiv quant-ph
arXiv:2610.10073v1 Announce Type: new Abstract: Wigner negativity has been shown to be a resource in quantum computing, raising the question of how to efficiently produce states with a large Wigner negativity. Cubic Gaussian states…
-
Quantum Information as a New Lens for Precision Neutrino Physics
arXiv quant-ph
arXiv:2606.31996v2 Announce Type: replace-cross Abstract: We present a quantum-information-theoretic study of three-flavor neutrino oscillations in long-baseline experiments by mapping flavor states to qubit-like representations and…
-
Collusion-Secure Semi-Quantum Secret Sharing Scheme using a Quantum Third Party
arXiv quant-ph
arXiv:2610.10176v1 Announce Type: cross Abstract: The security of a secret sharing protocol is compromised if one or more dishonest participants can reconstruct the secret by deviating from the prescribed protocol, particularly when such…
-
HomID : Benchmarking Intrinsic Dimension Estimators on Homogenous Manifolds with Anisotropic Embeddings
arXiv quant-ph
arXiv:2510.01335v2 Announce Type: replace-cross Abstract: The manifold hypothesis suggests that data lies on manifolds with smaller intrinsic dimension (ID) than their ambient dimension. However there is no empirical agreement on the…
-
An efficient variational polaron master equation for non-Markovian spin-boson dynamics: Transformed initial states and general observables
arXiv quant-ph
arXiv:2610.08953v1 Announce Type: new Abstract: We investigate the effects of initial states on the dynamics of a quantum spin-boson model using an efficient variational polaron master equation approach. The transformation of a factorized…
-
Pareto-optimal quantum kernel selection for unsupervised anomaly detection on real malware beaconing data
arXiv quant-ph
arXiv:2610.09717v1 Announce Type: new Abstract: Quantum kernel methods are leading candidates for a practical quantum advantage in machine learning, but assessing that potential requires two quantities usually reported separately: how well…
-
Stimulated emission for a three-level artificial atom in waveguide quantum electrodynamics
arXiv quant-ph
arXiv:2610.09776v1 Announce Type: new Abstract: This work is devoted to a theoretical study of the interaction of a quantum three-level ladder system with a continuous electromagnetic field in a one-dimensional open waveguide. We consider…
-
Quantum Optimization of the Color-of-Money Problem on IBM Quantum Hardware: A Proof-of-Concept Study
arXiv quant-ph
arXiv:2610.09798v1 Announce Type: new Abstract: The Color-of-Money (CoM) problem is a financial optimization challenge in which enterprises must determine how to allocate and route funds across multiple accounts, currencies, and time…
-
A Cognitive-Aware QML-CRL Framework for Detecting Affinity and Romance-Investment Fraud
arXiv quant-ph
arXiv:2610.09141v1 Announce Type: cross Abstract: We present a hybrid quantum-classical framework that detects affinity and romance-investment fraud by modelling the cognitive biases in a manipulative conversation. In our proposed…
-
Gaussian Scrooge Ensemble from Deep Thermalization in Free-Fermions
arXiv quant-ph
arXiv:2610.10279v1 Announce Type: cross Abstract: Deep thermalization indicates the emergence of universal ensembles of pure states in a subsystem after measuring its environment. We investigate this phenomenon in a free-fermion chain…
-
Contextuality analysis of disturbing data cannot preserve core Kochen-Specker principles
arXiv quant-ph
arXiv:2212.06976v3 Announce Type: replace Abstract: We address the challenge of extending the criterion for Kochen-Specker contextuality to data with disturbance, to accommodate experimental imperfections or applications to macroscopic…
-
Ground-state preparation via nonlinear quantum dissipation
arXiv quant-ph
arXiv:2604.03731v2 Announce Type: replace Abstract: Ground-state preparation of quantum many-body systems is a fundamental challenge across quantum science, with implications for quantum simulation, quantum computing, and the study of…
-
Realisation of a Protected Cat-Qutrit Manifold via Engineered Quantum Tunnelling
arXiv quant-ph
arXiv:2601.17675v3 Announce Type: replace Abstract: Engineering quantum tunnelling in phase space has emerged as a viable method for creating a protected logical qubit manifold with biased-noise properties. A promising approach is to…
-
Measurement-Efficient Differentiable Quantum Architecture Search for Combinatorial Optimization
arXiv quant-ph
arXiv:2610.10351v1 Announce Type: new Abstract: Differentiable quantum architecture search (DQAS) is a promising framework for the automated design of quantum circuits, particularly for variational quantum optimization algorithms. However…
-
Minimal representations of topology-preserving quantum-like states
arXiv quant-ph
arXiv:2609.27318v2 Announce Type: replace Abstract: We provide an equitable partition that gives an exact, minimal representation for the graph Cartesian product formed from quantum-like bits that preserves the relevant spectral and…
-
Efficient detection of spectral cluster states
arXiv quant-ph
arXiv:2610.09745v1 Announce Type: new Abstract: Multimode entangled states of light are key resources for high-dimensional photonic quantum technologies, particularly for continuous-variable quantum computing and quantum information…
-
Redundant Records of the Past: Unifying Quantum Darwinism and Decoherent Histories
arXiv quant-ph
arXiv:2610.09845v1 Announce Type: new Abstract: There exist two different paradigms for records in isolated quantum systems: decoherent histories (which determines which past events leave formal records) and quantum Darwinism (which…
-
Cotunneling-Assisted Redistribution of Nonpassivity in a Photosynthetic Junction
arXiv quant-ph
arXiv:2610.10001v1 Announce Type: cross Abstract: We investigate how cotunneling affects passive-state ordering in a Photosystem II reaction center modelled as a nonequilibrium molecular junction. We use a full pigment excitation manifold…
-
Rounding Almost Commuting Hamiltonians
arXiv quant-ph
arXiv:2605.26096v3 Announce Type: replace Abstract: Commuting Hamiltonians lie at the boundary between classical constraint satisfaction and quantum many-body physics, exhibiting rich quantum structure while remaining more tractable than…
-
From Static Lindblad Stabilizability to Robust Physical Control Sequences
arXiv quant-ph
arXiv:2610.02362v2 Announce Type: replace Abstract: Dissipative dynamics can stabilize a quantum target without providing a reliable sequence of finite control operations. We derive checkable conditions for implementing such stabilization…
-
Microwave-Free $^{13}$C Hyperpolarization of Diamond Particles Enabled by Magic Angle Spinning and NV Centers
arXiv quant-ph
arXiv:2609.07653v2 Announce Type: replace Abstract: Nuclear hyperpolarization from optically pumped color centers in solids offers an alternative to conventional microwave-driven dynamic nuclear polarization (DNP). Diamond can host the…
-
Proof of the absence of local conserved quantities in the Holstein model
arXiv quant-ph
arXiv:2605.19606v2 Announce Type: replace-cross Abstract: Absence of local conserved quantities, or nonintegrability, is often assumed when discussing various phenomena in quantum many-body systems, such as thermalization and transport…
-
Quantum Radiometric Calibration
arXiv quant-ph
arXiv:2512.14947v4 Announce Type: replace Abstract: Optical quantum computing, as well as sensing technology based on quantum correlations are in preparation. These require photodiodes with close to perfect quantum efficiency for the…
-
Excitation spectra and rank tomography of finite MPS tangent spaces
arXiv quant-ph
arXiv:2607.05269v3 Announce Type: replace-cross Abstract: We formulate the matrix product state (MPS) tangent-space excitation construction for finite, non-uniform systems with open boundary conditions, using the smooth full-rank stratum…
-
Interaction-Assisted Spin Coherence in a Multimode Trapped Atomic Ensemble
arXiv quant-ph
arXiv:2610.09073v1 Announce Type: new Abstract: In a thermally occupied multimode trapped ensemble, mode-dependent detunings can strongly suppress Ramsey contrast even when the underlying dynamics remains coherent. We develop a…
-
Physics-Aligned Electronic Ground-State Learning Improves Generalization
arXiv quant-ph
arXiv:2610.10298v1 Announce Type: cross Abstract: Machine-learned interatomic potentials (MLIPs) excel at in-distribution tasks, accelerating drug and material development, yet they struggle to generalize out-of-distribution. We propose to…
-
Quantum Darwinism through apparatus-mediated environmental recording
arXiv quant-ph
arXiv:2610.07568v2 Announce Type: replace Abstract: Quantum Darwinism explains classical objectivity through redundant environmental records of a system's pointer states. We show that these records can be established through an…
-
Heating and Escape of Confined Atoms Subject to Colored Noise
arXiv quant-ph
arXiv:2610.09047v1 Announce Type: new Abstract: The motion of a particle in a finite-depth confining potential, such as that of an electromagnetically trapped atom or ion, is approximately harmonic at low energy and softens as the escape…
-
Divide et Impera quantum neural networks for modular hybrid computing architectures
arXiv quant-ph
arXiv:2610.09623v1 Announce Type: new Abstract: Quantum machine learning is rapidly emerging as a promising and potentially more sustainable approach that can complement traditional, energy-hungry HPC, AI, and GPU resources-particularly…
-
Dissipation-selected photon-phonon pair and photon-bundle emission in a tripartite Mollow system
arXiv quant-ph
arXiv:2610.09971v1 Announce Type: new Abstract: Dissipation is generally regarded as detrimental to nonclassical-state generation, yet whether it can determine which quantum resource is emitted from an open hybrid quantum system remains…
-
Efficient Estimation of Logical Sensitivities Through Fault-Counting
arXiv quant-ph
arXiv:2610.10531v1 Announce Type: new Abstract: Quantum error-correcting circuits are affected by multiple physical noise mechanisms, whose contributions to logical failure must be understood to evaluate code performance and guide…
-
Matter wave bistability with a momentum chirped Bose-Einstein condensate
arXiv quant-ph
arXiv:2610.08942v1 Announce Type: cross Abstract: While a Fabry-Perot (FP) cavity interferometer is a standard tool in modern optics, analogous physics can also be observed with matter waves such as Bose-Einstein condensates (BECs)…
-
Using Learning Analytics to Study Novice Learners' Work on Quantum Circuit Simulator Tasks
arXiv quant-ph
arXiv:2610.09499v1 Announce Type: cross Abstract: Interactive quantum circuit simulators are increasingly used to support introductory quantum computing education for learners from varied disciplinary backgrounds. These environments can…
-
Intersubjective Agreement about Measurement Outcomes Is Unnecessary in QBism
arXiv quant-ph
arXiv:2508.16683v3 Announce Type: replace Abstract: The thought experiment called ``Wigner's Friend" has experienced a renewal of interest for interrogating the meaning of intersubjectivity and objectivity in quantum mechanics. These new…
-
Quantum Portfolio Optimization: An Extensive Benchmark
arXiv quant-ph
arXiv:2509.17876v3 Announce Type: replace Abstract: Recently, several researchers proposed portfolio optimization as a potential use case for quantum optimization. However, the literature is lacking an extensive benchmark quantifying the…
-
Wigner Time: a data-oriented approach to experimental timeline creation for quantum science and technology
arXiv quant-ph
arXiv:2609.06230v2 Announce Type: replace Abstract: Precisely timed, multi-device control in atomic, molecular and optical physics is provided by specialized real-time systems, which impose their own terms on the description of the…
-
Quantum anomaly detection in real scarce data
arXiv quant-ph
arXiv:2610.09635v1 Announce Type: new Abstract: Anomaly detection on small and unbalanced datasets remains very challenging in machine learning, although this scenario is common in several domains, including healthcare, cybersecurity…
-
Cost of Delay for Post-Quantum Migration: Putting Classical and Harvest-Now-Decrypt-Later Risk on One Ordered List
arXiv quant-ph
arXiv:2610.09029v1 Announce Type: cross Abstract: Organisations deciding which assets to migrate to post-quantum cryptography first, and how that work competes with a backlog of classical findings, lack a common unit: post-quantum scores…
-
Valley transitions during spin shuttling in Si/SiGe heterostructures
arXiv quant-ph
arXiv:2610.08984v1 Announce Type: cross Abstract: Valley excitations are considered one of the biggest challenges for a coherent spin shuttling in Si/SiGe heterostructures. In this work we theoretically investigate the valley dynamics…
-
Novel qubits in hybrid semiconductor-superconductor nanostructures
arXiv quant-ph
arXiv:2512.23336v2 Announce Type: replace-cross Abstract: Hybrid semiconductor-superconductor qubits have recently emerged as a promising alternative to traditional platforms, combining material advantages with device-level tunability. A…
-
Non-Orthogonal Amplitude Amplification for Hybrid CV-DV Quantum Processors
arXiv quant-ph
arXiv:2610.09353v1 Announce Type: new Abstract: We introduce a non-orthogonal amplitude amplification (NOAA) method for hybrid continuous-variable- discrete-variable (CV-DV) quantum processors, where the available CV-assisted projector is…
-
A nuclear clock synchronized to $^{229}$Th
arXiv quant-ph
arXiv:2606.08870v2 Announce Type: replace-cross Abstract: Atomic clocks have made time and frequency the most precisely measured quantities in physics, progressing from microwave standards that realize the SI second to optical clocks with…
-
Time-Bin Properties of Photon Pairs from a 2GHz Waveguide Resonator
arXiv quant-ph
arXiv:2610.09545v1 Announce Type: new Abstract: We produce degenerate photon pairs called signal and idler via parametric down-conversion (PDC) in a Fabry-P\'erot waveguide resonator having close to a 2GHz bandwidth in the telecom C-band…
-
Causal confusion in quantum systems: distinguishing direct cause and common cause
arXiv quant-ph
arXiv:2610.10004v1 Announce Type: new Abstract: The joint expectation values of quantum observables measured by two parties typically depend on the causal structure of the measurement protocol. The two causal structures we investigate here…
-
Existence of Kraus decomposition in infinite dimension via strongly-convergent direct process tomography
arXiv quant-ph
arXiv:2608.07207v2 Announce Type: replace Abstract: An algorithm is presented for Kraus decomposition of a completely positive operator over separable (countably-infinite-dimensional) Hilbert spaces, together with an elementary proof that…
-
An exact algorithm for U(N) matrix models in the gauge-invariant singlet sector
arXiv quant-ph
arXiv:2607.13725v3 Announce Type: replace-cross Abstract: Matrix models appear as fundamental descriptions of M-theory and D-brane dynamics, and via the gauge/gravity duality their gauge-invariant, or singlet, sector describes the purely…
-
Spurious zero-dispersion continua in full $(2,q)$-positivity: A linear hierarchy-depth lower bound from an exactly solvable counting operator
arXiv quant-ph
arXiv:2610.09698v1 Announce Type: new Abstract: Variational two-particle reduced-density-matrix methods impose hierarchies of semidefinite constraints. We ask whether a fixed level of such a hierarchy can recover even an elementary…
-
Kerr-Filtered Hybrid States from Double-Squeezed Tripartite Interactions
arXiv quant-ph
arXiv:2610.09904v1 Announce Type: new Abstract: Multipartite interactions provide a unique route to generate hybrid quantum states, yet their intrinsically weak nonlinear coupling limits the controllable manipulation of the resulting…
-
End-to-End Quantum Semantic Communication with Variational Quantum Neural Networks
arXiv quant-ph
arXiv:2609.25044v2 Announce Type: replace Abstract: Quantum-enabled learning is increasingly being explored for future communication and networking applications, including distributed sensing, Internet of Things (IoT), and distributed…
-
Quantifying Symmetry Breaking with Metric Adjusted Quantum Geometric Tensors
arXiv quant-ph
arXiv:2609.11926v3 Announce Type: replace Abstract: Quantifying properties of quantum states through the limits of their manipulation is a central goal of quantum resource theories. For symmetry breaking, the quantum geometric tensor (QGT)…
-
The Geometry of Lee-Yang Tensors
arXiv quant-ph
arXiv:2610.09485v1 Announce Type: new Abstract: We provide a geometric description of Lee-Yang tensors, building upon several recent results of Bravyi, Gosset, Liu, and Wong. By applying tools from complex Perron-Frobenius theory, we…
-
Thermodynamic signatures of spectral compression in weakly non-Hermitian Dirac fermions
arXiv quant-ph
arXiv:2604.14150v2 Announce Type: replace-cross Abstract: Non-Hermitian band descriptions capture how loss, gain, and environmental coupling reshape quantum matter, yet most experimental probes remain wave based or dynamical. Here we…
-
Numerically exact simulation of open quantum networks with strong system-bath couplings using tensor network path integrals
arXiv quant-ph
arXiv:2610.10259v1 Announce Type: new Abstract: Non-Markovian open quantum networks are among the most challenging problems in quantum theory, as they suffer from both, the exponentially scaling many-body state space as well as long memory…
-
Emergent Quantum Geometric Phases in Holey Graphene
arXiv quant-ph
arXiv:2609.39500v2 Announce Type: replace-cross Abstract: In graphene and other two-dimensional materials, periodic modulations of the electron density can significantly alter the energy spectrum and transport properties. Here, we report…