Papers
Live trends in quantum computing research, updated daily from arXiv.
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Slack-Free Deep-Unfolded Combinatorial Optimization Solver for Inequality Constraints
Ryo Hagiwara, Shunta Arai, Satoshi Takabe·Jul 22, 2026
Quantum annealing (QA) is used to solve combinatorial optimization problems (COPs). When COPs are implemented on quantum annealers, they are typically encoded as quadratic unconstrained binary optimization (QUBO) problems, but constraint encodings of...
A framework for separating dephasing from decoherence in matter-wave Bell interferometers
S. Kannan, Y. S. Athreya, X. T. Yan +2 more·Jul 22, 2026
Matter-wave Bell interferometers provide a sensitive probe of mass-dependent decoherence in entangled quantum systems. The degree of entanglement is obtained from the Bell-correlation amplitude of this interferometer. For observing potential mass-dep...
Construction of a Class of Communication-Efficient Quantum Secret Sharing Schemes
Chenhao Li, Zhihui Li, Jiansheng Guo +2 more·Jul 22, 2026
Quantum secret sharing is a fundamental technique in quantum cryptography. However, in practical quantum networks, it still faces several bottlenecks, such as high quantum communication cost and low transmission efficiency. To reduce the communicatio...
Propagation dynamics of high-gain vortex beams in symmetry-broken media via forward and backward three-wave mixing
Fan Meng, Hao Zhu, Xin-Yao Huang +1 more·Jul 22, 2026
In recent years, vortex light, a distinctive form of structured light, has attracted considerable attention owing to its unique properties and the rich physical phenomena arising from its interaction with matter. In this paper, we investigate the pro...
Nonreciprocal phonon blockade in spin quadratic optomechanical systems
Yao Dong, Guo-Feng Zhang·Jul 22, 2026
We propose a scheme for achieving nonreciprocal phonon blockade in a quadratic optomechanical (QOM) system consisting of two spinning resonators near-field coupled to a nanomechanical oscillator. Due to the Sagnac-Fizeau effect, pump fields propagati...
A reduction scheme for general-order Ising-like Hamiltonians in quantum heuristic solvers
Chengsi Mao, Pavel Mosharev, Yao Wang +1 more·Jul 22, 2026
The Ising model is ubiquitous in various optimization problems but notoriously difficult to solve due to combinatorial explosion. In view of this, Hamiltonian reduction is a useful preprocessing technique for reducing the effective problem size befor...
Emergent boundary-memory from unitarity constraints in a minimal two interacting quantum particles
Ibrahim Yahaya Muhammad, Tanapat Deesuwan, Monsit Tanasittikosol·Jul 22, 2026
We construct a simple model of two particles mutually attracting/repulsing in a one-dimensional lattice and investigate the corresponding dynamics. We show that enforcing reversible unitary evolution on a minimal direct-motion interaction rule necess...
A Multi-Resolvent Hierarchy for the ETH Smooth Function
Zhiqiang Huang·Jul 22, 2026
The eigenstate thermalization hypothesis (ETH) provides a statistical description of thermalization in isolated quantum many-body systems, yet the phenomenological smooth function $f_O(\bar{E},ω)$ -- which controls the energy dependence of off-diagon...
Generation of vortex-squeezed light in a coherently prepared medium
Fan Meng, Hao Zhu, Xin-Yao Huang +1 more·Jul 22, 2026
In this Letter, we theoretically propose an alternative scheme for generating vortex optical squeezing, based on the Raman scattering process in a coherently prepared medium, distinct from approaches such as parametric down-conversion and four-wave m...
Optimal Lower Bounds for Hamiltonian Simulation
Alexander Zlokapa, Richard R. Allen, Aram W. Harrow·Jul 22, 2026
For Hamiltonian $H = \sum_j h_j$, we prove asymptotically tight lower bounds on the gate and query complexities of simulating time evolution on a quantum computer. Our bounds hold for arbitrary term norms $\|h_j\|$, time $t$, and trace-distance error...
Distributed Entanglement Distribution Using Multiple Entanglement Sources in WDM-based Quantum Optical Networks
Anuj Agrawal, Abhay Singh Dulta, Bhaskar Kanseri·Jul 22, 2026
Quantum network implementations using single spontaneous parametric downconversion (SPDC)-based broadband entangled photon pair source (EPPS) have been reported recently. Here, leveraging the wavelength-correlation between entangled photon pairs, the...
Toroidal Transitions in Hydrogenic and Alkali Atoms
Kai Xiang Lee, Vincent Mancois, Kelvin Lim +1 more·Jul 22, 2026
In addition to electric and magnetic multipoles, the expansion of current density also yields toroidal terms, a lesser-known family of multipoles. A recent proposal, I. Kuprov $\textit{et al.}$, Science Adv. 8 abq6751 (2022), explores the possibility...
Multi-Criticality and RG Topology in the Charge-Kondo-Breakdown Scenario in the Cuprates
Stefan Kirchner, Petr Jizba·Jul 22, 2026
In this paper, we examine the dynamical charge-Kondo-breakdown scenario proposed for cuprate superconductors within the perspective of renormalization group (RG) topology. By analyzing the coupled RG flow equations governing the effective low-energy ...
A Multiclass Quantum Aligned Centroid Kernel
Kilian Tscharke, Pascal Debus·Jul 22, 2026
Kernel methods are powerful tools in machine learning but commonly used full-Gram kernels face three key limitations: (1) quadratic scaling with training set size; (2) the use of fixed, non-trainable kernels; and (3) the absence of an intrinsic formu...
Latency-Constrained Encoded Quantum Teleportation with Punctured Codes
Mahmoud Saad Abouamer, Jakob Kaltoft Søndergaard, Petar Popovski·Jul 22, 2026
Quantum teleportation is a key protocol for transmitting quantum information using entanglement and classical communication. Its reliability is constrained by both the availability and fidelity of shared entangled pairs, which are affected by stochas...
Energy Flux as an Entanglement Current in Moving-Mirror Radiation
Yasusada Nambu, Riku Yoshimoto·Jul 22, 2026
In this work, we investigate the quantum entanglement properties of analog Hawking radiation produced by a moving mirror. Using two detector modes defined through window functions on a quantum field, we quantify the bipartite entanglement established...
The Quantum Adiabatic Theorem for Non-Hermitian Dynamics
G. M. V. S. Aponso, B. P. W. Fernando, K. K. W. A. S. Kumara +1 more·Jul 22, 2026
We establish a quantitative adiabatic estimate for a class of finite-dimensional non-Hermitian Schrödinger dynamics. The original non-Hermitian Hamiltonian is assumed to be diagonalizable with real spectrum and non-crossing eigenvalues. We then const...
A Thermodynamic Pinning Criterion for Two-Dimensional Structural Superlubricity
Li Wang, Yunjie Ye·Jul 22, 2026
Incommensurability and elastic reconstruction do not by themselves define a structurally superlubric phase. We define fully sliding and pinned zero-temperature phases by $\limsup_{A\to\infty}τ_{\rm dep}^{\max}(A)=0$ and $\liminf_{A\to\infty}τ_{\rm de...
Fast Wave-optics Rendering of Multiplane Images for 3D Holographic Displays
Brian Chao, Dario Seyb, Nathan Matsuda +6 more·Jul 22, 2026
Recent advances in neural rendering have unlocked unprecedented capabilities in 3D reconstruction and novel view synthesis, giving rise to applications such as virtual fly-throughs of a 3D scene reconstructed from a set of sparse, casually captured i...
Robust logical Bell nonlocality based on quantum error correction codes
Qi Zhang, Jia-Wei Ying, Cheng Liu +2 more·Jul 22, 2026
Quantum nonlocality based on the violation of Bell-like inequalities constitutes a fundamental feature of quantum physics and drives the development of device-independent (DI) quantum information technologies. Existing studies of Bell nonlocality hav...