1134 papers
This paper establishes that state symmetries provide a general principle for identifying optimal measurements in quantum metrology, demonstrating how local symmetries enable Heisenberg-scaling precision with local measurements on graph states and extending these advantages to stabilizer-code subspaces that offer high precision, noise resilience, and built-in error correction.
This paper proposes a novel method utilizing entangled quantum walks to completely eliminate decision conflicts in three-player scenarios, thereby overcoming previous limitations in collective decision-making applications like traffic and server load management.
This paper proposes a variability-driven systems engineering framework using Orthogonal Variability Modelling and Systems Modelling Language to systematically model, trace, and evolve Quantum Key Distribution network architectures, thereby addressing the challenges of integrating complex quantum devices into existing classical infrastructure to meet future security needs.
This paper introduces the statistics-encoded tensor network (SeTN) method, which restores translational invariance by encoding disorder into an auxiliary layer to efficiently simulate and analyze dynamical phenomena in disordered quantum many-body spin chains.
This paper proposes quantitative evaluation methods for assessing the stability and convergence of numerical solutions to the semilinear Klein–Gordon equation with power-law nonlinearity, while investigating optimal thresholds based on variations in initial value amplitude and mass.
This paper introduces an enhanced post-quantum key agreement protocol that achieves provable, information-theoretic security against quantum adversaries through Rényi entropy-based techniques, distributed polynomial commitments, and quantum-resistant commitments, offering $2^{128}$ security guarantees without relying on computational hardness assumptions.
This paper demonstrates that the propagation dynamics of spatiotemporal Laguerre-Gaussian modes in isotropic dispersive media are governed by SU(2) symmetry and a conserved Gouy phase, which explains multi-petal far-field patterns and reveals a phase-locked revival mechanism in anomalous dispersion analogous to the Talbot effect.
Using tensor network simulations on a $24 \times 24$ lattice, this study characterizes the scattering dynamics of bound states and resonances in the two-dimensional quantum Ising model and demonstrates that highly-energetic collisions can induce violent false vacuum decay, leading to the spread of true vacuum bubbles.
This paper presents a microscopic derivation of a time-local master equation for tunneling bosonic qubits under local dephasing, revealing intrinsic non-Markovian features and identifying a resonance condition where noise induces steady-state entanglement rather than suppressing coherence.
This paper establishes fundamental limitations on blind distributed purification of noisy two-qubit states via LOCC while demonstrating that targeted purification is always achievable and providing an optimization-based algorithm to design such protocols for arbitrary state sets and noise profiles.
This paper demonstrates that the complex-valued non-Hermitian quantum geometric tensor governs intrinsic nonlinear electrical responses in gapped systems, revealing a unique transport mechanism where finite wavepacket width fundamentally alters conductivity—a phenomenon strictly absent in Hermitian systems.
This paper introduces a generic framework to elevate single-copy security to multi-copy security in quantum cryptography, demonstrating that under mild assumptions, single-copy pseudorandom states and unitaries imply their multi-copy counterparts and enabling the construction of identical-copy secure unclonable primitives like public-key quantum money and copy-protection.
This paper introduces a novel mechanism called exceptional-bound (EB) band engineering that enables system-size-controlled topological transitions in non-Hermitian systems through unique critical scaling near exceptional points, distinct from the non-Hermitian skin effect and applicable to diverse experimental platforms.
This paper proposes an energy-level engineering scheme using a tunable coupler to achieve a rapid, nonadiabatic controlled-Z gate with over 99.99% fidelity in just 22 ns, demonstrating robustness against anharmonicity offsets and spectator qubit interference to potentially extend circuit execution depth.
This paper introduces the instrumental group algebra (IGA) as a Banach algebra framework for sequential quantum measurements, demonstrating that the time-dependent Kraus-operator density (KOD) evolves via a classical Kolmogorov equation and that combining instruments corresponds to convolution within the IGA, thereby providing a unified mathematical structure for observables that cannot be measured by orthogonal projections.
This paper introduces the c-delta coefficient, a novel statistical measure that quantifies the similarity of internal divergence patterns between two groups of values to assess whether their variability structures are mirrored, offering a scale-invariant tool for applications ranging from quantum physics to machine learning.
This paper establishes a theoretical and numerical framework linking operator complexity, quantified by Operator Stabilizer Rényi entropy, to the efficiency of Pauli-propagation methods for simulating real-time dynamics in quantum spin systems, demonstrating that truncation accuracy is governed by this complexity and that the method achieves high performance in both free and interacting regimes.
This paper introduces a reinforcement learning framework that unifies quantum error correction with continuous system calibration, experimentally demonstrating a 3.5-fold improvement in logical stability on a superconducting processor and achieving record low logical error rates while proving the approach's scalability for future fault-tolerant quantum computing.
This paper proposes and analyzes optimized many-hypercube codes using smaller constituent blocks and efficient encoders to achieve lower logical error rates and reduced overhead, thereby facilitating the earlier experimental realization of high-rate fault-tolerant quantum computing.
This paper presents exactly solvable quantum models of opinion dynamics that leverage superposition, entanglement, and measurement-induced collapse to simulate consensus formation on networks, with practical validation on IBM Quantum devices demonstrating the potential of near-term quantum computers for social modeling.