1134 papers
This paper presents an exact mode decomposition of the tripartite information for free fermions on two-dimensional lattices, identifying a universal entanglement coefficient derived from the sine kernel that governs scale-dependent monogamy of mutual information and entanglement singularities at Lifshitz transitions.
This paper demonstrates that Bayesian post-correction of non-Markovian errors in bosonic lattice gravimetry via in situ measurements can recover Heisenberg-limited precision, provided the number of trapping modes is at least two greater than the number of independent error sources.
This paper introduces the Non-Classical Network (NCnet), a classical neural architecture that exhibits quantum-like non-classical statistical behaviors through gradient competitions and implicit inter-task correlations, revealing that the resulting CHSH statistic serves as a novel indicator for understanding internal network dynamics and generalization performance across different resource regimes.
This paper presents the first full-dimensional quantum scattering calculations for rovibrationally excited HD+HD collisions, identifying near-resonant transitions and low-energy resonances dominated by l=3 partial waves that agree with previous experimental cross sections and provide rate coefficients for temperatures ranging from 0.1 K to 200 K.
This paper presents a theoretical framework demonstrating that the transport and fluorescence dynamics of biexcitons in molecular aggregates are critically governed by the initial state's coherence and momentum composition, revealing distinct transport behaviors for standing versus traveling waves and significant differences between J and H aggregates driven by band structure-dependent interference.
This paper proposes a unified framework for measuring quantum chaos and ergodicity by leveraging the enhanced robustness of Hamiltonian learning against small errors, offering both analytical insights and viable experimental methods for quantum simulators.
This paper introduces a new class of smooth conditional entropies based on measured Rényi divergences to establish a tightened one-shot bound for quantum privacy amplification that significantly improves existing results, recovers optimal asymptotic error exponents, and proves optimality up to logarithmic terms.
This paper proposes a spin-dependent Kronig-Penney lattice realization of a triangular ladder for ultracold atoms that, through controllable pair hopping and geometric frustration, gives rise to robust pair superfluid and chiral superfluid phases as confirmed by density matrix renormalization group calculations and XXZ spin model mapping.
This paper presents a tomography-free quantum state certification method using local measurement data to construct effective parent Hamiltonians, which was experimentally validated on IBM hardware to certify genuine multipartite entanglement and establish fidelity lower bounds for Dicke states up to thirteen qubits.
This paper introduces an erasure-Pauli channel model to derive rigorous bounds on the optimal two-way assisted rates of polarization entanglement distribution in optical fibers, establishing a benchmark for long-distance quantum communication that remains robust against polarization mode dispersion and detector dark counts.
The paper demonstrates that for open quantum systems coupled to Gaussian environments, the evolution can be described by a Markovian quantum master equation with an error that decreases exponentially with the inverse system-bath coupling strength, achieved through a generalized Born-Markov approximation that can be iterated to arbitrarily high orders.
This paper proposes a hybrid framework combining tensor networks and quantum autoregressive moving average models to characterize time-correlated noise, demonstrating that noise spectral features dictate infidelity scaling exponents and enabling the prediction of large-scale quantum algorithm performance (up to 128 qubits) from moderate-scale simulations for hardware-relevant benchmarking.
This paper benchmarks an uncontrolled classical ansatz for solving Heisenberg-Langevin equations of spin-1/2 systems against known quantum dynamics derived from a modified Weisskopf-Wigner theory, evaluating its accuracy at both zero and high temperatures.
This paper proves that max-LINSAT is tightly inapproximable within any constant factor beyond the random-assignment ratio under , a hardness threshold that coincides with the asymptotic performance limit of decoded quantum interferometry, thereby delineating the boundary between classical worst-case hardness and potential quantum advantage.
This paper presents the construction of explicit, asymptotically good quantum error-correcting codes that achieve linear-time encoding and decoding, with specific variants offering logarithmic-depth circuits for both operations or linear gate counts with logarithmic depth for encoding and unencoding.
This paper introduces a novel qutrit quantum error-correcting code that enables a transversal implementation of the non-reversible AND gate by interpreting symmetric T-depth circuit decompositions as CSS codes, while also proposing mixed qubit-qutrit protocols for magic state distillation.
This paper introduces a framework for feedback-controlled quantum clocks, demonstrating that while classical clockworks cannot surpass their optimal performance with feedback, quantum clockworks can achieve a genuine enhancement in signal-to-noise ratio, suggesting feedback is essential for pushing the fundamental limits of quantum timekeeping.
This paper elucidates the mechanism behind the improved accuracy of semiclassical dynamics enhanced by generalized quantum master equations by demonstrating that exact "left-handed" time-derivatives delay inaccuracy while introducing long-term instability, and subsequently proposes a protocol to determine memory kernel cutoffs that leverages short-time gains while avoiding unphysical behavior in challenging regimes.
This paper demonstrates break-even performance in noise-adapted quantum error correction on IBM hardware by utilizing variational circuits and dynamical decoupling to extend logical qubit lifetimes beyond physical ones, with current limitations attributed primarily to measurement readout fidelity.
This paper demonstrates a planar trimon circuit featuring three strongly coupled transmon-like modes that enables universal, high-fidelity control of its rich state space through multi-tone driving, offering a compact and coherent alternative to standard transmon-based superconducting processors.