Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Single shot distinguishability of noisy quantum channels
Satyaki Manna·Feb 5, 2026
Among the intriguing features of quantum theory, the problem of distinguishing quantum channels is of fundamental interest. In this paper, we focus on the single-shot discrimination of two noisy quantum channels using two distinct classes of probes: ...
Bell and EPR experiments with signalling data
Lucas Maquedano, Sophie Egelhaaf, Amro Abou-Hachem +4 more·Feb 5, 2026
The no-signalling principle is a fundamental assumption in Bell-inequality and quantum-steering experiments. Nonetheless, experimental imperfections can lead to apparent violations beyond those expected from finite-sample statistics. Here, we propose...
Spatiotemporal Topological Phase Transition in non-Hermitian Photonic System
Zimeng Zeng, Zhuoyang Li, Jiayao Liu +2 more·Feb 5, 2026
While energy band topology in spatial photonic crystals (PCs) and momentum-band topology in temporal crystals have each served as powerful probes of topological phases in their respective domains, their unification in a static platform remains unexpl...
Quantum-Enhanced Deterministic Inference of $k$-Independent Set Instances on Neutral Atom Arrays
Juyoung Park, Junwoo Jung, Jaewook Ahn·Feb 5, 2026
Noisy quantum annealing experiments on Rydberg atom arrays produce measurement outcomes that deviate from ideal distributions, complicating performance evaluation. To enable a data-driven benchmarking methodology for quantum devices that accounts for...
Matchgate synthesis via Clifford matchgates and $T$ gates
Berta Casas, Paolo Braccia, Élie Gouzien +2 more·Feb 5, 2026
Matchgate unitaries are ubiquitous in quantum computation due to their relation to non-interacting fermions and because they can be used to benchmark quantum computers. Implementing such unitaries on fault-tolerant devices requires first compiling th...
Entanglement Before Spacetime in Quantum-Gravity-Induced Interactions
Hollis Williams·Feb 5, 2026
Quantum-gravity-induced entanglement of massive systems (QGEM) is commonly approximated in the nonrelativistic static limit by a Newtonian interaction between spatially separated masses. In this work, we reformulate the gravitationally mediated inter...
Hybrid Quantum-Classical Optimization for Multi-Objective Supply Chain Logistics
Raoul Heese, Timothée Leleu, Sam Reifenstein +2 more·Feb 5, 2026
A multi-objective logistics optimization problem from a real-world supply chain is formulated as a Quadratic Unconstrained Binary Optimization Problem (QUBO) that minimizes cost, emissions, and delivery time, while maintaining target distributions of...
High-order dynamical decoupling in the weak-coupling regime
Leeseok Kim, Milad Marvian·Feb 5, 2026
We introduce a high-order dynamical decoupling (DD) scheme for arbitrary system-bath interactions in the weak-coupling regime. Given any decoupling group $\mathcal G$ that averages the interaction to zero, our construction yields pulse sequences whos...
Entanglement-enhanced quantum metrology via alternating in-phase and quadrature modulation
Jihao Ma, Jiahao Huang, Chaohong Lee·Feb 5, 2026
Quantum metrology harnesses quantum entanglement to improve measurement precision beyond standard quantum limit. Although nonlinear interaction is essential for generating entanglement, during signal accumulation, it becomes detrimental and therefore...
More on OTOCs and Chaos in Quantum Mechanics -- Magnetic Fields
Cameron Beetar, Jeff Murugan·Feb 5, 2026
We revisit thermal out-of-time-order correlators (OTOCs) in single-particle quantum systems, focusing on magnetic billiards. Using the stadium billiard as a testbed, we compute the thermal OTOC $C_T(t) = -\langle [x(t), p]^2 \rangle_β$ and extract Ly...
Gradient Analysis of Barren Plateau in Parameterized Quantum Circuits with multi-qubit gates
Yuhan Yao, Yoshihiko Hasegawa·Feb 5, 2026
The emergence of the Barren Plateau phenomenon poses a significant challenge to quantum machine learning. While most Barren Plateau analyses focus on single-qubit rotation gates, the gradient behavior of Parameterized Quantum Circuits built from mult...
Quantum Dots as Solid-State Sources of Entangled Photon Pairs
Xingling Pan, Zhiming Chen, Yingtao Ding +3 more·Feb 5, 2026
Semiconductor quantum dots (QDs) have emerged as a premier solid-state platform for the deterministic generation of nonclassical light, offering a compelling pathway toward scalable quantum photonic systems. While single-photon emission from QDs has ...
Quantum scattering in helically twisted geometries: Coulomb-like interaction and Aharonov-Bohm effect
Augusto Tadeu P. de Araújo, Edilberto O. Silva·Feb 5, 2026
We investigate the scattering of a charged quantum particle in a helically twisted background that induces an effective Coulomb-like interaction, in the presence of an Aharonov-Bohm (AB) flux. Starting from the nonrelativistic Schrödinger equation in...
Quantum-Inspired Algorithm for Classical Spin Hamiltonians Based on Matrix Product Operators
Ryo Watanabe, Joseph Tindall, Shohei Miyakoshi +1 more·Feb 5, 2026
We propose a tensor-network (TN) approach for solving classical optimization problems that is inspired by spectral filtering and sampling on quantum states. We first shift and scale an Ising Hamiltonian of the cost function so that all eigenvalues be...
Robust Negativity in the Quantum-to-Classical Transition of Kerr Dynamics
Mohsin Raza, John B. DeBrota, Ariel Shlosberg +2 more·Feb 5, 2026
We quantify the quantum-to-classical transition of the single-mode Kerr nonlinear dynamics in the presence of loss. We establish three time scales that govern the dynamics, each with distinct characteristics. For times short compared to the Ehrenfest...
Quantum Fisher Information Revealing Parameter Sensitivity in Long-Baseline Neutrino Experiments
Bhavna Yadav, Amir Subba, Yu Shi·Feb 5, 2026
Determination of the leptonic CP-violating phase $δ_{\mathrm{CP}}$, the atmospheric mixing angle $θ_{23}$, and the mass-squared difference $Δm_{31}^{2}$ constitutes a primary objective of current and next-generation long-baseline neutrino experiments...
Practical continuous-variable quantum key distribution using dynamic digital signal processing: security proof and experimental demonstration
Lu Fan, Zhengyu Li, Sheng Liu +8 more·Feb 5, 2026
Digital signal processing technology has paved the way for the realization of high-speed continuous-variable quantum key distribution systems. However, existing security proofs are limited to static digital signal processing algorithms, while practic...
Broadband Population Transfer Based on Suture Adiabatic Pulses
Jiaming Li, Xi-Wang Luo, Guang-Can Guo +1 more·Feb 5, 2026
High-fidelity coherent population transfer plays a vital role in the realization of quantum memories. However, population transfer with high performance across a broad frequency range is still challenging due to the finite Rabi coupling strength limi...
Quantum Sequential Circuits
D. -S. Wang·Feb 5, 2026
This work introduces and characterizes quantum sequential circuits (QSCs) as a hardware-oriented paradigm for quantum computing, built upon a novel foundational element termed the quantum transistor. Unlike conventional qubit-based architectures, QSC...
QASMTrans: An End-to-End QASM Compilation Framework with Pulse Generation for Near-Term Quantum Devices
Aaron Hoyt, Meng Wang, Fei Hua +8 more·Feb 5, 2026
QASMTrans is a lightweight, high-performance, C++-based quantum compiler that bridges abstract quantum algorithms to device-level control and is designed for just-in-time (JIT) deployment on QPU testbeds with tightly integrated FPGAs or CPUs. We focu...