1134 papers
This paper introduces a uniform process tensor approach using time-translation invariant matrix product operators (uniTEMPO) to efficiently compute multi-time correlation functions and multi-dimensional spectra of non-Markovian open quantum systems directly in Fourier space, thereby avoiding the computational cost of explicit real-time evolution.
This paper experimentally validates a unified input-output model incorporating internal and external coupling phases to demonstrate full control over interference-induced antiresonances and the transition from level repulsion to attraction in room-temperature cavity magnonic systems.
This paper proposes that probabilistic classical field theories are equivalent to quantum field theories when formulated using fluctuating field observables, which introduce non-commuting operators and a functional integral formalism derived from classical probability laws.
This paper introduces a method to construct an ancilla system of size for measuring arbitrary logical Pauli operators of weight in general qLDPC stabilizer codes, thereby significantly reducing the asymptotic overhead of various quantum code surgery schemes.
This paper proposes and forecasts that an optomechanical scheme using two levitated nanospheres can significantly improve laboratory constraints on symmetron dark energy by detecting interaction-induced resonance splitting, potentially surpassing existing bounds by several orders of magnitude.
This study numerically demonstrates that a two-dimensional exciton-polariton quantum fluid driven by counter-propagating lasers exhibits four distinct dynamical regimes, including a robust turbulent state characterized by spontaneous vortex nucleation and reduced coherence, which can be mapped and controlled via pump strength, detuning, and momentum in experimentally realistic micro-cavity platforms.
This paper introduces a robust classical shadow protocol using a truncated mean estimator that maintains standard sample complexity for predicting properties of time-averaged quantum states or channels, even when experimental rounds exhibit arbitrary history-dependent correlations that violate the i.i.d. assumption.
This paper presents a case study demonstrating the integration of the Quantum Device Management Interface (QDMI) with Amazon Braket to standardize access and manage the full task lifecycle across heterogeneous quantum hardware and simulators by treating the cloud service as a unified device.
This paper establishes an information-theoretic framework demonstrating that while classical post-processing of error syndromes offers at most a quadratic improvement in logical observable estimation, leveraging syndrome information to tailor quantum control enables exponential reductions in effective logical error rates.
This paper demonstrates that flexible catalysis, where an auxiliary system restores its initial state only after a finite cycle, provides a strict advantage over standard rigid catalysis by enabling higher success probabilities in stochastic entanglement transformations and achieving deterministic state conversions in quantum thermodynamics that are otherwise impossible.
This paper introduces a novel virtual rishon framework that enforces gauge symmetry via intermediate quantum-link representations to enable scalable simulations of lattice gauge theories in d+1 dimensions using both classical tensor networks and near-term quantum hardware, validated by benchmarking on the multi-flavor Schwinger model and 2D string tension.
This paper proposes a constant-depth Quantum Imaginary Time Evolution (QITE) method using dynamic fan-out circuits and a reduced-parameter ansatz to efficiently prepare ground states for dense Hamiltonians, demonstrating through simulations and IBM hardware experiments that while current measurement and feedback overheads limit performance, significant error reductions would allow this dynamic approach to outperform standard unitary implementations.
This paper demonstrates that a graph neural network trained on the Strong Disorder Renormalization Group (SDRG) method can accurately infer the entanglement structure and pairing hierarchy of disordered long-range interacting quantum spin chains, achieving quantitative agreement with SDRG predictions across various interaction exponents and temperatures without retraining.
This paper establishes security bounds for unidimensional discrete-modulated CV-QKD under the Gaussian extremality assumption, revealing that the method systematically overestimates eavesdropper information for constellations larger than four states, thereby rendering secure key extraction impossible for larger constellations and highlighting the need for alternative analysis methods or optimized non-uniform designs.
This paper proposes an improved constrained hypercube mixer for the Quantum Approximate Optimization Algorithm that reduces circuit size and enhances noise robustness for a broad class of linearly constrained combinatorial optimization problems, thereby advancing the practical applicability of QAOA in the NISQ era.
This paper challenges the prevailing assumption that parameter sufficiency guarantees the absence of false traps in quantum-classical optimization landscapes by establishing a comprehensive analytical framework that reveals how the loss of quantum distinguishability can still induce non-global optima even with abundant tunable parameters.
This paper presents a scalable algorithm for robust and optimal control of open quantum systems that effectively mitigates imperfections and decoherence, achieving an ultra-low infidelity of 0.60% in superconducting circuits with computational complexity comparable to conventional closed-system methods.
This paper establishes that dynamical quantum phase transitions (DQPTs) in generic quadratic fermionic systems are fundamentally characterized by the restoration of spin-flip symmetry in specific zero-energy dynamical critical modes, providing a unified framework that explains the necessary but insufficient conditions for DQPTs and their relationship to ground-state quantum phase transitions.
This paper demonstrates that Knill error correction, which replaces repeated syndrome measurements with a single round using an auxiliary logical Bell state, can be decoded using standard code-capacity algorithms, thereby significantly reducing the classical control requirements for large-scale quantum computers.
This theoretical study demonstrates that pulse-duration-sensitive high harmonic generation in the chiral Weyl semimetal RhSi not only extends to higher photon energies by promoting multi-band excitations but also enables the synthesis of attosecond locally chiral light with pronounced circular dichroism, offering a pathway toward compact chiral light sources and topological electronics.