Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Multiple mobility rings in non-Hermitian Su-Schrieffer-Heeger chain with quasiperiodic potentials
Guan-Qiang Li, Zhi-Yu Lin, You-Jiao Dong +3 more·Jan 28, 2026
The localization property of a non-Hermitian Su-Schrieffer-Heeger (SSH) chain with quasi-periodic on-site potential is investigated. In contrast to the preceding investigations, the quantum phase transition between localized state and extended one is...
Critical Charge and Current Fluctuations across a Voltage-Driven Phase Transition
José F. B. Afonso, Stefan Kirchner, Pedro Ribeiro·Jan 28, 2026
We investigate bias-driven non-equilibrium quantum phase transitions in a paradigmatic quantum-transport setup: an interacting quantum dot coupled to non-interacting metallic leads. Using the Random Phase Approximation, which is exact in the limit of...
Echo Cross Resonance gate error budgeting on a superconducting quantum processor
Travers Ward, Russell P. Rundle, Richard Bounds +9 more·Jan 28, 2026
High fidelity quantum operations are key to enabling fault-tolerant quantum computation. Superconducting quantum processors have demonstrated high-fidelity operations, but on larger devices there is commonly a broad distribution of qualities, with th...
Violation of the Leggett-Garg inequality in photon-graviton conversion
Kimihiro Nomura, Akira Taniguchi, Kazushige Ueda·Jan 28, 2026
The Leggett-Garg inequality (LGI) is a temporal analogue of Bell's inequality and provides a quantitative test of the nonclassicality of a system through its violation. We analytically investigate the violation of the LGI in the context of photon-gra...
Network Nonlocality Sharing in Generalized Star Network from Bipartite Bell Inequalities
Hao-Miao Jiang, Xiang-Jiang Chen, Liu-Jun Wang +1 more·Jan 28, 2026
This work investigates network nonlocality sharing for a broad class of bipartite Bell inequalities in a generalized star network with an $(n,m,k)$ configuration, comprising $n$ independent branches, $m$ sequential Alices per branch, and $k$ measurem...
Scalable Multi-QPU Circuit Design for Dicke State Preparation: Optimizing Communication Complexity and Local Circuit Costs
Ziheng Chen, Junhong Nie, Xiaoming Sun +2 more·Jan 28, 2026
Preparing large-qubit Dicke states is of broad interest in quantum computing and quantum metrology. However, the number of qubits available on a single quantum processing unit (QPU) is limited -- motivating the distributed preparation of such states ...
Miniatures on Open Quantum Systems
Jan Derezinski, Vojkan Jaksic, Claude-Alain Pillet·Jan 28, 2026
We presents a unified and concise exposition of key topics in the mathematical theory of open quantum systems, developed within the framework of operator algebras. The manuscript consolidates and extends a series of invited articles originally prepar...
Electromagnetically Induced Transparency Spectra of Ladder Four-Level System with Quantum Frequency Mixing
Sheng-Xian Xiao, Tao Wang·Jan 28, 2026
In this paper, we generalized the quantum frequency mixing technology to a ladder-type four-level system and studied its effect on electromagnetically induced transparency spectra. We found a secondary splitting of Autler-Townes splitting in the prob...
Fingerprints of classical memory in quantum hysteresis
Francesco Caravelli·Jan 28, 2026
We present a simple framework for classical and quantum ``memory'' in which the Hamiltonian at time $t$ depends on past values of a control Hamiltonian through a causal kernel. This structure naturally describes finite-bandwidth or filtered control c...
A Quantum Photonic Approach to Graph Coloring
Jesua Epequin, Pascale Bendotti, Joseph Mikael·Jan 28, 2026
Gaussian Boson Sampling (GBS) is a quantum computational model that leverages linear optics to solve sampling problems believed to be classically intractable. Recent experimental breakthroughs have demonstrated quantum advantage using GBS, motivating...
Computer Science Challenges in Quantum Computing: Early Fault-Tolerance and Beyond
Jens Palsberg, Jason Cong, Yufei Ding +7 more·Jan 28, 2026
Quantum computing is entering a period in which progress will be shaped as much by advances in computer science as by improvements in hardware. The central thesis of this report is that early fault-tolerant quantum computing shifts many of the primar...
Fast state transfer via loop weights
Gabor Lippner, Yujia Shi·Jan 28, 2026
We prove that almost-linear-time high-fidelity state transfer is achievable in a quantum spin chain using loop weights at the second and second-to-last nodes. We provide specific parameter values, and using a careful analysis of the eigenvectors we m...
A general interpretation of nonlinear connected time crystals: quantum self-sustaining combined with quantum synchronization
Song-hai Li, Najmeh Es'haqi-Sani, Xingli Li +1 more·Jan 28, 2026
Although classical nonlinear dynamics suggests that sufficiently strong nonlinearity can sustain oscillations, quantization of such model typically yields a time-independent steady state that respects time-translation symmetry and thus precludes time...
Micro-mobility dispatch optimization via quantum annealing incorporating historical data
Takeru Goto, Masayuki Ohzeki·Jan 28, 2026
This paper proposes a novel dispatch formulation for micro-mobility vehicles using a Quantum Annealer (QA). In recent years, QA has gained increasing attention as a high-performance solver for combinatorial optimization problems. Meanwhile, micro-mob...
Contextuality as an External Bookkeeping Cost under Fixed Shared-State Semantics
Song-Ju Kim·Jan 28, 2026
Contextuality is a central feature distinguishing quantum from classical probability theories, but its operational meaning is often stated only qualitatively. In this Letter, we study a simple information-theoretic question: how much additional conte...
Complex nonlinear sigma model
Kazuki Yamamoto, Kohei Kawabata·Jan 28, 2026
Motivated by the recent interest in the criticality of open quantum many-body systems, we study nonlinear sigma models with complexified couplings as a general framework for nonunitary field theory. Applying the perturbative renormalization-group ana...
Universal thermodynamic implementation of a process with a variable work cost
Philippe Faist·Jan 28, 2026
The minimum amount of thermodynamic work required in order to implement a quantum computation or a quantum state transformation can be quantified using frameworks based on the resource theory of thermodynamics, deeply rooted in the works of Landauer ...
Quantum Model Parallelism for MRI-Based Classification of Alzheimer's Disease Stages
Emine Akpinar, Murat Oduncuoglu·Jan 28, 2026
With increasing life expectancy, AD has become a major global health concern. While classical AI-based methods have been developed for early diagnosis and stage classification of AD, growing data volumes and limited computational resources necessitat...
Engineering the non-Hermitian SSH model with skin effects in Rydberg atom arrays
J. N. Bai, F. Yang, D. Yan +2 more·Jan 27, 2026
We propose and systematically analyze a practical scheme for implementing a one-dimensional non-Hermitian Su-Schrieffer-Heeger model using individually addressable Rydberg atom arrays. Our setup consists of an atomic chain with three-atom unit cells,...
Krypton-sputtered tantalum films for scalable high-performance quantum devices
Maciej W. Olszewski, Lingda Kong, Simon Reinhardt +9 more·Jan 27, 2026
Superconducting qubits based on tantalum (Ta) thin films have demonstrated the highest-performing microwave resonators and qubits. This makes Ta an attractive material for superconducting quantum computing applications, but, so far, direct deposition...