1157 papers
This paper derives the non-local non-stabiliserness (magic) in gluon and graviton scattering, demonstrating that the helicity basis naturally manifests this quantum resource for standard interactions but fails to do so when new physics operators are introduced.
This paper introduces the Pauli Envelope framework to address atom loss in neutral-atom quantum computers by proposing a new Mid-SWAP syndrome extraction circuit and two novel decoders (Envelope-MLE and Envelope-Matching) that significantly improve error thresholds, effective code distance, and error suppression compared to existing methods.
This paper proposes a distributed computing framework that leverages operator sparsity, the Cannon algorithm, and dynamic subspace construction to significantly reduce the computational complexity and memory footprint of simulating large-scale cavity QED systems governed by Lindblad master equations.
This paper introduces OptiQKD, a protocol-agnostic machine learning framework that combines Temporal Convolutional Networks and Reinforcement Learning to dynamically optimize Quantum Key Distribution parameters, achieving significant improvements in Secure Key Rate and Quantum Bit Error Rate while strictly adhering to composable security standards.
This paper proposes and analyzes a scalable scheme for implementing arbitrary unitary transformations on ultracold atoms in optical lattices by mapping superlattice dynamics to discrete linear optics, enabling high-density, sublinear-depth coherent rearrangement robust against experimental imperfections.
This paper proves that finding an exact minimum weight decoder for the quantum colour code is NP-hard, establishing a significant computational contrast with the surface code and highlighting the necessity of heuristic or approximate algorithms for practical decoding.
This paper reviews recent advancements in artificial flat band systems by focusing on the classification of flat band generators via compact localized states, the effects of disorder and many-body interactions, and the growing experimental realizations across diverse physical platforms.
This paper reports the experimental preparation and measurement of long-lived metastable states in the 4f5d6s configuration of a single trapped Yb ion, revealing lifetimes ranging from 0.92 s to over 30 s that are corroborated by atomic structure calculations and offer new prospects for quantum information and optical clock applications.
This paper introduces a highly efficient magic state distillation protocol based on permutation-invariant gnu codes that utilizes non-Clifford gates and variable input states to achieve a 0.5 error threshold and 1/2 distillation rate with as few as two qubits, surpassing previous schemes while remaining compatible with existing protocols.
This paper investigates the ambiguity between algebraic and operational quantum correlation functions caused by measurement invasiveness, establishing quantitative bounds on their discrepancies, identifying conditions for their equivalence, and applying these findings to clarify the structural origins of Leggett-Garg inequality violations.
This paper provides a direct and rigorous derivation of the modified Langevin noise formalism from the canonical quantization of macroscopic electromagnetism in the Schrödinger picture by establishing exact analytical expressions for the scattering, electric, and magnetic polariton operators, thereby proving their bosonic nature and demonstrating that they diagonalize the system's Hamiltonian.
This paper introduces a novel quantum error mitigation scheme for NISQ devices that utilizes a polynomial subset of extended BBGKY hierarchy equations as a sampling criterion to effectively recover real-time chiral dynamics in the Schwinger model with polynomial resource overhead.
This paper numerically investigates error thresholds for Pauli channels using coset weight enumerators to demonstrate significant non-additivity in small concatenated stabilizer codes, derive closed-form expressions for repetition codes, and provide both positive and negative results alongside counterintuitive observations to inform future lower bound research.
This study reveals that while the onset of chaos in the one-dimensional Bose-Hubbard model induces a sub-ballistic regime in the correlation transport distance due to long-time tails and front amplitude decay, the correlation front itself maintains ballistic propagation across all interaction strengths, offering a more nuanced understanding of correlation dynamics beyond simple light-cone models.
This paper proposes that Hermiticity in quantum mechanics is a symmetry arising from global inner product conservation, which becomes obstructed by causal horizons in black hole geometries, thereby inducing effective non-Hermitian dynamics that unify gravity, entropy production, and the generalized second law of thermodynamics.
This paper employs a protocol-based benchmarking methodology to evaluate and compare IBM's Eagle and Heron quantum processors, demonstrating that the newer Heron architecture offers substantial performance improvements and clearer practical quantum advantages over its predecessor.
This paper introduces HyQBench, a standardized simulation and benchmarking framework for hybrid continuous-variable and discrete-variable quantum computing that defines novel complexity metrics and evaluates a diverse suite of algorithms to demonstrate the viability and resource requirements of emerging hybrid hardware platforms.
This paper reveals that while partial knowledge of a quantum cryptography key alone has minimal impact on authentication, the combination of this knowledge with an attacker's ability to manipulate messages on the quantum channel creates a security vulnerability that can be mitigated by implementing specific countermeasures.
This paper discusses Erwin Schrödinger's discovery of the relativistic wave equation for a spin-zero charged particle in a Coulomb field and explains the reasons behind his decision not to publish it.
This paper demonstrates that while the combination of Hamiltonian evolution and dissipation in unital quantum Markov semigroups can initially violate complete modified logarithmic Sobolev inequalities, exponential relative entropy decay eventually re-emerges at finite timescales, with a rate inversely bounded by the dissipative strength in the regime of "self-restricting noise" where strong damping suppresses noise spreading.