Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
No More Hooks in the Surface Code: Distance-Preserving Syndrome Extraction for Arbitrary Layouts at Minimum Depth
Yuga Hirai, Shota Ikari, Yosuke Ueno +1 more·Mar 2, 2026
Hook errors are a major challenge in implementing logical operations with the surface code, because they can reduce the fault distance below the code distance. This motivates syndrome-extraction circuits that suppress hook-error effects for the stabi...
Sustaining high-fidelity quantum logic in neutral-atom circuits via mid-circuit operations
Rui Lin, You Li, Le-Tian Zheng +11 more·Mar 2, 2026
The realization of fault-tolerant quantum computation hinges on the ability to execute deep quantum circuits while maintaining gate fidelities consistently above error-correction thresholds. Although neutral-atom arrays have recently demonstrated hig...
Single-ion phonon laser in the quantum regime
Dong Yuanzhang, He Siwen, Deng Zhijiao +3 more·Mar 2, 2026
The quantum phonon laser state is a vibrational state generated by phonon coherent amplification based on quantum mechanics. Its core is coherent excitation and manipulation of phonon quantum states by controlling phonon dynamics. This technology bre...
QuMeld: A Modular Framework for Benchmarking Qubit Mapping Algorithms
Gabrielius Keibas, Linas Petkevičius·Mar 2, 2026
The qubit mapping problem is a challenge in quantum computing that is related to mapping logical qubits to the physical ones on the quantum computer. Due to the diversity of quantum computer topologies and circuits, numerous approaches solving this p...
Intersubjectivity as a principle determining physical observables and non-classicality
Shun Umekawa, Koki Ono, Hayato Arai·Mar 2, 2026
We identify an operational principle that singles out Projection-Valued Measures (PVMs) among general Positive Operator-Valued Measures (POVMs), bridging the modern quantum measurement theory and the traditional formulation based on projective measur...
Quantum Thermal Machines Improved by Internal Coupling: From Equilibrium to Non-equilibrium Limit Cycles
Jingyi Gao, Naomichi Hatano·Mar 2, 2026
We investigate how internal coupling influences the operation and performance of a quantum Otto cycle operating as the Gibbs-state limit cycle (GSLC), equilibrating limit cycle (ELC), and non-equilibrating limit cycle (NELC). We show that the interna...
Theory of anomalous Landau-Zener tunneling induced by nonlinear coupling
Wen-Yuan Wang, Hong-Juan Meng·Mar 2, 2026
We develop a general theory of Landau-Zener (LZ) tunneling in a two-level system with amplitude-dependent, sign-reversible nonlinear coupling, distinguishing it fundamentally from conventional on-site nonlinearity. Through a combination of analytical...
Efficient Learning Algorithms for Noisy Quantum State and Process Tomography
Chenyang Li, Shengxin Zhuang, Yukun Zhang +4 more·Mar 2, 2026
Efficiently characterizing large quantum states and processes is a central yet notoriously challenging task in quantum information science, as conventional tomography methods typically require resources that grow exponentially with system size. Here,...
Single impurity-induced localization transitions in electronic systems
Niaz Ali Khan, Munsif Jan, Muzamil Shah +3 more·Mar 2, 2026
Anderson localization is a fundamental phenomenon in disordered quantum systems, where transport is suppressed by wave interference from extensive randomness. Moving beyond traditional multi-impurity scenarios, we investigate impurity-induced localiz...
Violation of Bell-type Inequalities on Mutually-commuting von Neumann Algebra Models of Entanglement Swapping Networks
Bingke Zheng, Shuyuan Yang, Jinchuan Hou +1 more·Mar 2, 2026
Violation of Bell inequalities in bipartite systems represented by mutually-commuting von Neumann algebras has pioneered the study of vacuum entanglement in algebraic quantum field theory. It is unexpected that the maximal violation of Bell inequalit...
Exact bounds on quantum partial search algorithm and improving the parallel search
Yan-Bo Jiang, Xiao-Hui Wang, Kun Zhang +1 more·Mar 2, 2026
Grover's algorithm provides a quadratic speedup over classical algorithms for searching unstructured databases and is known to be strictly optimal in oracle query complexity, with tight bounds on its success probability. Although the standard Grover ...
Generalized quantum master equation from memory kernel coupling theory
Rui-Hao Bi, Wei Liu, Wenjie Dou·Mar 2, 2026
The generalized quantum master equation provides a powerful framework for non-Markovian dynamics of open quantum systems. However, the accurate and efficient evaluation of the memory kernel remains a challenge. In this work, we introduce a comprehens...
Applicability and Limitations of Quantum Circuit Cutting in Classical State-Vector Simulation
Mitsuhiro Matsumoto, Shinichiro Sanji, Takahiko Satoh·Mar 2, 2026
Circuit cutting partitions a large quantum circuit into smaller subcircuits that can be executed independently and recombined by classical post-processing. In classical state-vector simulation with full-state reconstruction, the runtime is governed b...
Nonreciprocal entanglement in exciton optomechanics with an optical parametric amplifier
Zhen-Sen Lin, Rui Zhang, Zi-Wei Jiang +4 more·Mar 2, 2026
We study nonreciprocal bipartite and tripartite entanglement in a spinning exciton-optomechanical system (EOMS) with an optical parametric amplifier (OPA). We demonstrate that nonreciprocal entanglement among photons, excitons, and phonons can be ach...
Quantum-Inspired Fine-Tuning for Few-Shot AIGC Detection via Phase-Structured Reparameterization
Kaiyang Xing, Han Fang, Zhaoyun Chen +4 more·Mar 2, 2026
Recent studies show that quantum neural networks (QNNs) generalize well in few-shot regimes. To extend this advantage to large-scale tasks, we propose Q-LoRA, a quantum-enhanced fine-tuning scheme that integrates lightweight QNNs into the low-rank ad...
Quantum framework for parameterizing partial differential equations via diagonal block-encoding
Hiroshi Yano, Yuki Sato·Mar 2, 2026
We study a quantum-algorithmic framework for parameterizing partial differential equations (PDEs). For a broad class of problems in which the discretized parameter field admits a diagonal representation, block-encodings of diagonal matrices, or diago...
A moment-based approach to the injective norm of random tensors
Stephane Dartois, Benjamin McKenna·Mar 2, 2026
In this paper, we present a technically simple method to establish upper bounds on the expected injective norm of real and complex random tensors. Our approach is somewhat analogous to the moment method in random matrix theory, and is based on a dete...
Remote state preparation of single-partite high-dimensional states in complex Hilbert spaces
Jun-Hai Zhao, Si-Qi Du, Wen-Qiang Liu +2 more·Mar 1, 2026
High-dimensional quantum systems offer a new playground for quantum information applications due to their remarkable advantages such as higher capacity and noise resistance. We propose potentially practical schemes for remotely preparing four- and ei...
Quantum Monte Carlo in Classical Phase Space with the Wigner-Kirkwood Commutation Function. II. Diagonal Approximation in Position Space
Phil Attard·Mar 1, 2026
A third order expansion for Wigner-Kirkwood commutation function, a complex function in classical phase space that accounts for the Heisenberg uncertainty relation, is approximated and integrated over momentum to give a real function in position conf...
Intermodal entanglement in a quantum optical model of HHG due to the back-action on the driving field
Ákos Gombkötő, Péter Ádám, David Theidel +1 more·Mar 1, 2026
Preparation of nonclassical light with special quantum properties is essential for quantum technologies. High-harmonic generation (HHG) is a process which not only enables the creation of attosecond pulses but also has the potential to generate light...