1134 papers
This paper establishes optimal lower bounds and explicit algorithms for preparing arbitrary fermionic Gaussian states using matchgate circuits, while also providing conditions for depth-constrained preparation, a new classical simulation method, and an extension to -doped states.
This paper establishes a monoidal functor from the category of order unit spaces to the category of probabilistic models, demonstrating that the convex-operational framework for physical theories can be fully subsumed by the test-space approach without requiring generalized test spaces, while also providing insight into the nature of unsharp observables.
This paper proposes a scalable, dissipative engineering scheme using waveguide QED and the quantum Zeno effect to deterministically generate steady-state W-type entanglement among multiple emitters, such as trapped cesium atoms, with infidelity that scales inversely with cooperativity.
This study employs neural-network quantum states and Schrieffer-Wolff transformations to demonstrate that isotropic antiferromagnetic Heisenberg perturbations drive the toric code through a quantum phase transition into a fourfold-degenerate Néel phase, characterized by a critical point identified via fidelity and entanglement diagnostics.
This paper proposes a unified framework demonstrating that the structural difference in decoherence—specifically, the preservation of coherence within the lowest phonon-number manifold by a quantized graviton bath versus its inevitable destruction by a classical stochastic gravitational field—provides an operational criterion for distinguishing the quantum or classical nature of gravitational waves using mesoscopic optomechanical systems.
This paper demonstrates the application of the Variational Quantum Eigensolver (VQE) on NISQ devices to analyze high-resolution NMR spectra of AB and AB2 spin systems, successfully deriving ground state energies that align well with traditional variational methods.
This paper proposes an optimization framework for Quantum Network Tomography that utilizes Integer Linear Programming to determine optimal monitor placements and measurement assignments, demonstrating that distributed end-node monitors can achieve estimation precision comparable to hub-based monitoring while preventing overloading through a joint accuracy-overhead objective.
This paper demonstrates the calculation of low-lying rovibrational energy levels of HO with an accuracy of a few cm by deriving a qubit Hamiltonian from Watson's model and employing a hybrid quantum-classical quantum-selected configuration-interaction method on a trapped-ion quantum computer.
This paper proposes a robust and fast state transfer scheme in non-Hermitian cavity electromagnonics by combining counterdiabatic driving with Floquet engineering, demonstrating that this approach achieves higher transition efficiency and superior resilience against coupling and systematic errors compared to non-Hermitian shortcuts, particularly in the broken-symmetric regime.
This paper establishes that multimode deterministic Gaussian channels admit a symmetric-space description on the double Siegel disk, where general channel dynamics are realized as linear-fractional (Möbius) actions on a single matrix representative, thereby unifying covariance-matrix channel theory with symmetric-space geometry and enabling simple composition rules for mixed Gaussian states.
This paper introduces a novel Variational Quantum Algorithm that overcomes the limitations of existing penalty-based and ansatz-based methods for constrained combinatorial optimization by utilizing a strategically designed loss function to guarantee convergence to optimal feasible solutions while maintaining low hardware overhead through an efficient validation oracle.
This paper demonstrates a significant breakthrough in hybrid quantum networking by successfully entangling a single trapped ytterbium ion with a solid-state europium-doped quantum memory over a 75-meter distance, achieving a fidelity of 89.21% and violating the CHSH-Bell inequality to confirm nonlocality between heterogeneous quantum nodes.
This paper develops a theoretical framework for optical pumping in alkali-metal vapors under quasi-high-pressure buffer gas conditions, where collisional broadening is comparable to hyperfine splitting, revealing significant deviations from high-pressure approximations to guide the optimization of atomic magnetometry systems.
This paper presents a microscopic fourth-order perturbation theory description of resonant and off-resonant Casimir-Polder potentials on an excited test atom near a two-dimensional atomic array, demonstrating how the interaction scales from single-atom Van der Waals limits to macroscopic boundary regimes and can be tuned via microscopic array parameters.
This paper reports the experimental realization and modeling of a tunable triple-antidot molecule hosting interacting quantum Hall quasiparticles, where measured conductance spectra reveal molecular energy levels that align with a theoretical tunneling model, thereby establishing a foundation for studying complex systems with non-trivial quantum statistics.
This paper establishes a unified multi-shot statistical framework for Rydberg-atom quantum receivers that derives optimal and practical phase-averaged likelihood-ratio tests, demonstrating that just 5–10 quantum shots enable detection performance significantly surpassing classical methods despite non-Gaussian noise and phase blindness.
This paper establishes a necessary and sufficient condition for the classical simulability of polynomial-size quantum circuits followed by sparse classical post-processing and demonstrates that constant-depth variants of such circuits can be efficiently simulated by a probabilistic algorithm using commuting quantum circuits with bounded gate complexity.
This paper demonstrates that even at very small centripetal accelerations, circular motion intrinsically and anisotropically modifies the Lamb shift of atoms, with the effect's magnitude and sign depending critically on the atomic polarization direction and potentially rivaling the inertial Lamb shift when angular velocity exceeds the transition frequency.
This paper characterizes the degradation of three-qubit GHZ and W entangled states under Gaussian and white noise by combining Uhlmann-Jozsa fidelity measurements with spin Wigner function phase-space visualizations to reveal how different entanglement structures transition toward classical behavior.
This paper proposes Variational Quantum Operator Simulation (VQOS), a novel algorithm that realizes time evolution operators in shallow quantum circuits up to five times shallower than standard Trotterization by utilizing a variational principle for operators rather than fixed-state evolution.