W-state graphs are precisely the matching-covered graphs with specific half-edge colorings whose 3-connected components are W-cones, enabling efficient recognition and ruling out simple graphs.
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Available: https://link.aps.org/doi/10.1103/PhysRevA
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Experimental observation of OAM non-conservation in Type-I SPDC attributed to spatial walk-off, demonstrated with a sensitive two-photon OAM detector and approximation-free theory.
A randomized linear-time phase-folding algorithm using constant-width bitstring abstraction optimizes T-count in quantum circuits orders of magnitude faster than prior tools while achieving comparable reductions.
Geometric curvature of a metric-induced connection and non-trivial holonomies around non-contractible loops obstruct global Hermitianization of quasi-Hermitian quantum systems.
A structure-aware transformer trained on 3-14 qubit systems predicts Trotter orderings for 16-20 qubit 1D Heisenberg Hamiltonians with a mean fidelity gap of 0.00115 to the best of 24 candidates.
QuIC provides a training-free quantum graph embedding proven permutation-invariant and injective for labeled graphs under an irrational-angle condition in the ideal case, with empirical separation shown on noisy hardware for hard graph families including CFI instances.
A microarchitecture-aware compiler for lattice surgery that exploits C-Phase commutativity to enable concurrent multi-target operations and dynamic event-driven scheduling, cutting execution time by up to 59.7 times versus standard baselines.
Noise from quantum hardware simulators significantly alters mutant detection distances, making equivalent mutants harder to separate from faults, with output-distribution metrics reaching 73.03% accuracy and 74.89% F1-score under device-specific thresholds.
Monotonic concave amplification functions of the form N minus the product of exponentials yield decay rates for the optimal value of multiplayer games under parallel repetition.
The Saturable Electronic Reluctance Switch enables bi-stable low-power switching of permanent-magnet fields while suppressing control-current noise by orders of magnitude.
Coherent superposition of noisy links transforms separable quantum states into entangled states during distribution, turning noise into a constructive resource.
A branch-resolved framework using classical Choi shadows characterizes feed-forward errors in dynamic circuit teleportation, showing reversal in post-processing vs. PROM mitigation performance between qubit layouts with different readout errors.
A self-referenced LLO CVQKD system with passive state preparation achieves 10.34 Mbps asymptotic secret key rate over 23.5 dB loss free-space channel with low excess noise and turbulence robustness.
Lottery BP adds randomness to belief propagation decoding and uses syndrome voting to achieve far higher accuracy on topological quantum codes while reducing reliance on expensive global decoders.
Absence of coherent superpositions in the coherent-state basis is a sufficient condition for Wigner function positivity, necessary and sufficient for cat states and limiting cases of higher-order cat states.
Suppressing the coherent Rayleigh component in the source qubit's fluorescence in a cascaded two-qubit waveguide-QED system makes the probe's quantum wave mixing spectrum suppress sidebands from odd numbers of source photons, confirming correlated photon pair participation.
Reordering database addresses before ESOP minimization produces smaller QROM circuits for Grover oracles, with simulated annealing yielding roughly 30% size reduction over fixed ordering for small N.
Loss-aware natural gradient variants are introduced by embedding the loss hypersurface in a statistical manifold or using quantum state overlaps, yielding conformal updates that adjust effective step size.
Distributed toric and hyperbolic Floquet codes maintain logical error suppression when entire nodes fail at low rates, with the toric code outperforming a monolithic device below 0.05% physical error rate for node failure probability p/100.
An 11-species model with state-specific atomic H kinetics reproduces experimental radiance profiles from H2/He shocks and improves ionization and radiation predictions compared to alternate models.
Coupled Arnol'd cat maps on circulant graphs produce entropy independent of connectivity because translational symmetry cancels the expected increase from added links.
Averaging quantum correlations over mutually unbiased bases, all orthonormal bases, operator bases, and unitary twirling via metric-adjusted skew information yields one intrinsic closed expression, enabling complementarity relations among wave-particle features, entropy, and average correlation.
PINNs combined with Magnus expansion learn scheduling functions and adiabatic gauge potentials that yield higher normalized QFI than Euler-Lagrange baselines in nearest-neighbor, dipolar, and trapped-ion spin models up to six qubits.
Approximate analytical solutions for 1D topologically trivial magnetic solitons in nanowires are presented with numerical validation, nonlinear interface behavior, pulse-based generation, and application to controlled domain wall driving.
citing papers explorer
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W-state graphs: Structure and Algorithms
W-state graphs are precisely the matching-covered graphs with specific half-edge colorings whose 3-connected components are W-cones, enabling efficient recognition and ruling out simple graphs.
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Observation of OAM non-conservation in entangled photon generation
Experimental observation of OAM non-conservation in Type-I SPDC attributed to spatial walk-off, demonstrated with a sensitive two-photon OAM detector and approximation-free theory.
-
Linear-Time T-Gate Optimization via Random Abstraction
A randomized linear-time phase-folding algorithm using constant-width bitstring abstraction optimizes T-count in quantum circuits orders of magnitude faster than prior tools while achieving comparable reductions.
-
Geometric and Topological Obstructions to Hermitianization in Quasi-Hermitian Quantum Systems
Geometric curvature of a metric-induced connection and non-trivial holonomies around non-contractible loops obstruct global Hermitianization of quasi-Hermitian quantum systems.
-
Structure-Aware Transformers for Learning Near-Optimal Trotter Orderings with System-Size Generalization in 1D Heisenberg Hamiltonians
A structure-aware transformer trained on 3-14 qubit systems predicts Trotter orderings for 16-20 qubit 1D Heisenberg Hamiltonians with a mean fidelity gap of 0.00115 to the best of 24 candidates.
-
QuIC: A Training-Free Quantum Graph Embedding from Ideal Analysis to Practical Hardware Evaluation
QuIC provides a training-free quantum graph embedding proven permutation-invariant and injective for labeled graphs under an irrational-angle condition in the ideal case, with empirical separation shown on noisy hardware for hard graph families including CFI instances.
-
C-Phase-Aware Compilation for Efficient Fault-Tolerant Quantum Execution
A microarchitecture-aware compiler for lattice surgery that exploits C-Phase commutativity to enable concurrent multi-target operations and dynamic event-driven scheduling, cutting execution time by up to 59.7 times versus standard baselines.
-
Robust Mutation Analysis of Quantum Programs Under Noise
Noise from quantum hardware simulators significantly alters mutant detection distances, making equivalent mutants harder to separate from faults, with output-distribution metrics reaching 73.03% accuracy and 74.89% F1-score under device-specific thresholds.
-
Multiplayer parallel repetition without dependency-breaking and anchoring variables: monotonic, concave amplification
Monotonic concave amplification functions of the form N minus the product of exponentials yield decay rates for the optimal value of multiplayer games under parallel repetition.
-
The Saturable Electronic Reluctance Switch: Switchable low-power and low-noise generation of magnetic fields using permanent magnets
The Saturable Electronic Reluctance Switch enables bi-stable low-power switching of permanent-magnet fields while suppressing control-current noise by orders of magnitude.
-
Entanglement Generation During Distribution via Spatial Superposition
Coherent superposition of noisy links transforms separable quantum states into entangled states during distribution, turning noise into a constructive resource.
-
Branch-Resolved Characterization of Feed-Forward Error in Dynamic Teleportation via Classical Choi Shadows
A branch-resolved framework using classical Choi shadows characterizes feed-forward errors in dynamic circuit teleportation, showing reversal in post-processing vs. PROM mitigation performance between qubit layouts with different readout errors.
-
High-Rate Free-Space Continuous-Variable QKD with Self-Referenced Passive State Preparation
A self-referenced LLO CVQKD system with passive state preparation achieves 10.34 Mbps asymptotic secret key rate over 23.5 dB loss free-space channel with low excess noise and turbulence robustness.
-
Lottery BP: Unlocking Quantum Error Decoding at Scale
Lottery BP adds randomness to belief propagation decoding and uses syndrome voting to achieve far higher accuracy on topological quantum codes while reducing reliance on expensive global decoders.
-
Operational criterion for Wigner function negativity
Absence of coherent superpositions in the coherent-state basis is a sufficient condition for Wigner function positivity, necessary and sufficient for cat states and limiting cases of higher-order cat states.
-
Photon pairs, squeezed light and the quantum wave mixing effect in a cascaded qubit system
Suppressing the coherent Rayleigh component in the source qubit's fluorescence in a cascaded two-qubit waveguide-QED system makes the probe's quantum wave mixing spectrum suppress sidebands from odd numbers of source photons, confirming correlated photon pair participation.
-
Database Reordering for Compact Grover Oracles with ESOP Minimization
Reordering database addresses before ESOP minimization produces smaller QROM circuits for Grover oracles, with simulated annealing yielding roughly 30% size reduction over fixed ordering for small N.
-
Loss-aware state space geometry for quantum variational algorithms
Loss-aware natural gradient variants are introduced by embedding the loss hypersurface in a statistical manifold or using quantum state overlaps, yielding conformal updates that adjust effective step size.
-
Tolerating Device Failure in Distributed Quantum Computing
Distributed toric and hyperbolic Floquet codes maintain logical error suppression when entire nodes fail at low rates, with the toric code outperforming a monolithic device below 0.05% physical error rate for node failure probability p/100.
-
State-Specific Kinetic Modeling of Atomic H for H$_2$/ He Entry Flows
An 11-species model with state-specific atomic H kinetics reproduces experimental radiance profiles from H2/He shocks and improves ionization and radiation predictions compared to alternate models.
-
Coupled Arnol'd cat maps on circulant graphs
Coupled Arnol'd cat maps on circulant graphs produce entropy independent of connectivity because translational symmetry cancels the expected increase from added links.
-
Quantum average correlations and complementarity relations via metric-adjusted skew information
Averaging quantum correlations over mutually unbiased bases, all orthonormal bases, operator bases, and unitary twirling via metric-adjusted skew information yields one intrinsic closed expression, enabling complementarity relations among wave-particle features, entropy, and average correlation.
-
Physics-Informed Neural Networks for Maximizing Quantum Fisher Information in Time-Dependent Many-Body Systems
PINNs combined with Magnus expansion learn scheduling functions and adiabatic gauge potentials that yield higher normalized QFI than Euler-Lagrange baselines in nearest-neighbor, dipolar, and trapped-ion spin models up to six qubits.
-
Propagation, generation, and utilization of topologically trivial magnetic solitons in magnetic nanowires
Approximate analytical solutions for 1D topologically trivial magnetic solitons in nanowires are presented with numerical validation, nonlinear interface behavior, pulse-based generation, and application to controlled domain wall driving.
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Boson correlations are spurious for classical states
Boson correlations for states with well-behaved Glauber-Sudarshan P-representations are spurious statistical correlations due to Simpson's paradox from symmetry-breaking in ensemble averages over varying geometries.
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Arqon: A suite of control applications enabling a reliable quantum network
Arqon delivers reliable quantum network service via admission control and scheduling that satisfies defined reliability requirements for accepted demands in static topologies, with O(k^3) and O(N^3) complexity.
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Nuclear forward scattering of Bessel beams in $^{229}$Th:CaF$_2$
Bessel beam nuclear forward scattering in 229Th:CaF2 can determine the relative distribution of quantization axis directions inside the crystal.
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Charging Quantum Batteries via Dissipative Quenches
Dissipative dynamics activate finite ergotropy from thermal quantum spin chains, with collective effects creating temperature- and size-dependent steady-state passivity via dark subspaces, while dephasing suppresses extraction.
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The Dirac oscillator in the curved spacetime of a cloud of strings
The Dirac oscillator in cloud-of-strings spacetime admits exact bound states whose energy spectrum is quantized by radial number n and angular number κ and depends explicitly on oscillator frequency ω, string-cloud parameter a, and curvature-modified effective mass m_eff.
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Characterizing quantum correlations and quantum teleportation in $gg \to t\bar{t}$ and $q\bar{q} \to t\bar{t}$ processes under noisy channels
Quantum teleportation using noisy top-quark pairs stays above the classical fidelity threshold of 2/3.
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Entanglement is Half the Story: Post-Selection vs. Partial Traces
A hybrid tensor network framework interpolates between classical and quantum models via controllable post-selection, with a trainable hyperparameter that complements bond dimension to enhance quantum machine learning.
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Efficient Complex-Valued State Preparation on Bucket Brigade QRAM
Precomputes rotation angles classically and adds a magnitude-then-phase procedure to enable complex-valued state preparation on BBQRAM at unchanged O(log²(MN)) query cost with no reversible arithmetic on the QPU.
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Quantum average correlation based on average coherence
A new average correlation for bipartite quantum systems is defined as the difference between global and local skew information; it satisfies non-negativity, contractivity under local channels, and local unitary invariance, with equivalence proven between MUB and Haar-measure definitions plus a wave-
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Electric field dependent g factors of RaOCH$_3$ molecule
A new method calculates electric-field-dependent g-factors for the first excited rotational level of RaOCH3 and identifies K-doublet levels with small g-factor differences.
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A Comprehensive Analysis of Accuracy and Robustness in Quantum Neural Networks
QCNN, QRNN, and QViT perform well on low-feature data but degrade on high-feature datasets, with QViT most robust to quantum noise and classical-style models better against adversarial noise.
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Warring Contextualities -- Provably Classical vs Provably Nonclassical
Kochen-Specker contextuality generalizes nonclassicality while Spekkens' noncontextuality generalizes classicality, reconciling the two as successive stages in a hierarchy of classicality.
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Quantum Protocols for Time Synchronisation and Distribution: A Critical Assessment
Quantum time synchronization protocols do not provide a near-term replacement for classical methods in most applications because time transfer precision remains the limiting factor, though they add value for physical-layer security.
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Quantum Complexity and New Directions in Nuclear Physics and High-Energy Physics Phenomenology
A review of how quantum information science is expected to provide new tools and insights for nuclear and high-energy physics phenomenology and quantum simulations.
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Fundamentals and Applications of Hybrid Electro- and Opto-mechanical system coupled to Superconducting Qubit: A Short Review
A review surveying coupling mechanisms in superconducting qubit-mechanical resonator hybrids and their extension to optomechanical architectures for quantum sensing applications.
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Over forty years of research towards the understanding of Quantum Brownian Motion -- the contributions of A. O. Caldeira
The paper summarizes A. O. Caldeira's foundational work on quantum Brownian motion, including dissipation in tunneling, alternative models, and links to decoherence and quantum thermodynamics.
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Synthetic Polariton Matter in the solid state
Exciton polaritons in microcavities form synthetic photonic crystals with engineered band structures and interactions for exploring many-body physics from mean-field to quantum regimes.