1134 papers
This paper presents and experimentally demonstrates a scalable, high-fidelity two-qubit gate scheme for trapped-ion quantum processors that utilizes transverse, time-dependent structured-light forces to suppress spectral crowding errors while maintaining single-ion addressing.
The paper demonstrates that using a single-mode readout in a squeezing-enhanced interferometer achieves the ultimate quantum limit of precision for phase estimation, performing asymptotically as well as a more complex two-mode readout.
This paper introduces a novel, succinct QUBO formulation for permutation problems using sorting networks that reduces variable complexity to while enabling unbiased sampling and supporting complex operations like multiplication, inversion, and order checking.
This paper derives complex and quaternionic angular momentum operators from generalized position operators within a real Hilbert space, demonstrating that although their commutation relations differ from standard Hermitian algebras, their effective quantum expectation values remain consistent with conventional results, validating them as viable deformed angular momentum frameworks.
This paper argues that in interacting quantum field theories at finite density, the derivative of entanglement entropy with respect to subregion size converges to the thermal entropy density in the large-subregion limit, thereby establishing a universal link between entanglement and thermodynamics that allows for the extraction of equation-of-state information, as demonstrated nonperturbatively in the three-dimensional O(4) model.
This paper demonstrates that the finite-temperature critical transverse-field Ising chain exhibits quantitative signatures of black-hole physics, such as universal antipodal transport, exponential relaxation via quasi-normal modes, and a Hawking-Page-like entropy minimum, thereby establishing it as an experimentally accessible platform for probing quantum black hole dynamics within the AdS/CFT correspondence.
This paper introduces a structure-aware distributed quantum optimization framework that leverages factor graph decomposition and shared entanglement to achieve Grover-like query complexity while significantly reducing per-processor qubit requirements through a scalable, hierarchical divide-and-conquer strategy.
This paper argues that Soulas et al.'s proposed construction of a unique tensor product structure fails as a counterexample to Stoica's impossibility proof because it cannot simultaneously maintain invariance and compatibility with physical observations, thereby confirming the trilemma that preferred structures cannot emerge solely from the Hamiltonian and state vector.
This paper presents a general construction of genuinely multipartite entanglement signals using families of lower-partite symmetric local-unitary invariants and Möbius inversion on the partition lattice, demonstrating how this framework unifies existing examples and enables the extraction of genuine signals from general multi-invariants.
This paper reports the first realization of fractional topological phases, characterized by winding numbers and robust edge states, in a fully unitary, noninteracting single-coin split-step quantum walk on finite cyclic graphs, demonstrating how step-dependent protocols enable the engineering of flat bands and unconventional bulk-boundary correspondence in small-scale synthetic quantum systems.
This study numerically demonstrates that vertically oriented hollow gold nanocavities coupled to monolayer MoS2 can spectrally tune and significantly enhance A and B excitonic emission through geometry-controlled plasmon resonance, achieving up to 144-fold photoluminescence increases and enabling precise engineering of excitonic peak ratios for advanced valleytronic and sensing applications.
This paper demonstrates that light scattering from pairs of point-like dipoles exhibits exact resonances when the dipoles violate the optical theorem (indicating nonequilibrium or active conditions), leading to potentially infinite scattering amplitudes, while similar but finite resonances in equilibrium systems can still yield significant amplification factors.
This paper presents an accessible, Bloch-space-based explanation for why the Born rule is unavoidable in quantum systems of dimension three and higher, while clarifying why non-Born probability rules remain possible for two-dimensional qubits.
The paper demonstrates that a specific promise problem distinguishing between a fixed permutation and a phase-modified permutation on an -qubit system can be solved with certainty using a single query and a measurement of only one qubit, without requiring ancilla qubits.
This paper derives closed-form expressions for the entanglement fidelity of various standard quantum noise models using Schumacher's Kraus-operator approach, analyzing how channel and source parameters influence the preservation of quantum correlations for general input states.
This paper introduces a Lindbladian learning method that combines maximum-likelihood estimation on transient Pauli measurements with a neural differential equation framework to robustly infer open-system quantum dynamics, including dissipative mechanisms, across various hardware platforms and noise conditions with high efficiency.
This paper proposes and analyzes a gate reflectometry-based experimental procedure that enables the simultaneous discrimination of all four computational basis states of a pair of spin qubits in silicon double quantum dots, offering a pathway to reduce readout overhead in scalable quantum computers.
This paper proposes a unified theoretical framework that extends the action-angle formalism to the Helmholtz-Schrödinger equation using Hardy space to resolve phase paradoxes via a "Dirac sea" of negative energy states, thereby explaining Talbot revivals and fractal interference patterns in multimode waveguides with anharmonic refractive indices.
This paper demonstrates that on current noisy intermediate-scale quantum (NISQ) devices, second-order symmetric Trotterization fails to outperform first-order methods in simulating transverse-field Ising model dynamics due to hardware errors dominating over the theoretical Trotter error, suggesting that higher-order decompositions should be used cautiously in early-stage quantum simulations.
This paper proposes an alternative quantum information advantage protocol based on parallel-repeated CHSH games that utilizes an information-based memory measure, offering an efficient verifier and a more noise-robust, efficient quantum prover compared to the recent experimental demonstration by Kretschmer et al.