Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantum Entanglement as a Cohomological Obstruction
Kazuki Ikeda·Nov 6, 2025
We recast quantum entanglement as a cohomological obstruction to reconstructing a global quantum state from locally compatible information. We address this by considering presheaf cohomologies of states and entanglement witnesses. Sheafification eras...
Quantum dot thermal machines -- a guide to engineering
Eugenia Pyurbeeva, Ronnie Kosloff·Nov 6, 2025
Continuous particle exchange thermal machines require no time-dependent driving, can be realised in solid-state electronic devices, and miniaturised to nanometre scale. Quantum dots, providing a narrow energy filter and allowing to manipulate particl...
Self-correcting High-speed Opto-electronic Probabilistic Computer
Ramy Aboushelbaya, Annika Moslein, Hadi Azar +2 more·Nov 6, 2025
We present a novel self-correcting, high-speed optoelectronic probabilistic computer architecture that leverages source-device independent (SDI) quantum photonic p-bits integrated with robust electronic control. Our approach combines the intrinsic ra...
Cluster States Generation with a Quantum Metasurface
Yehonatan Levin, Uri Israeli, Rivka Bekenstein·Nov 6, 2025
We investigate the implementation of photonic cluster state generation protocols using quantum metasurfaces comprising sub-wavelength atomic arrays which enables quantum-controlled reflectivity. These cluster states are generated using fundamental qu...
Determination of quark-gluon-quark interference within the proton
Alexey Vladimirov, Guillermo Portela, Simone Rodini·Nov 6, 2025
Quarks and gluon, as quantum particles, are subjects to various effects that go beyond the naive parton picture and are not captured by ordinary parton densities. In this work, we investigate the twist-three parton distribution functions, which encod...
Quasiprobabilities from incomplete and overcomplete measurements
Jan Sperling, Laura Ares, Elizabeth Agudelo·Nov 6, 2025
We discuss the (re-)construction of quasiprobability representations from generic measurements, including noisy ones. Based on the measurement under study, quasiprobabilities and the associated concept of nonclassicality are introduced. A practical c...
Random access Bell game by sequentially measuring the control of the quantum SWITCH
Gaurang Agrawal, Saptarshi Roy·Nov 6, 2025
Preserving quantum correlations such as Bell nonlocality in noisy environments remains a fundamental challenge for quantum technologies. We introduce the Random Access Bell Game (RABG), a task where an entangled particle propagates through a sequence...
Quantum time-marching algorithms for solving linear transport problems including boundary conditions
Sergio Bengoechea, Paul Over, Thomas Rung·Nov 6, 2025
This article presents the first complete application of a quantum time-marching algorithm for simulating multidimensional linear transport phenomena with arbitrary boundaries, whereby the success probabilities are problem intrinsic. The method adapts...
Space-Bounded Communication Complexity of Unitaries
Longcheng Li, Xiaoming Sun, Jialin Zhang +1 more·Nov 6, 2025
We study space-bounded communication complexity for unitary implementation in distributed quantum processors, where we restrict the number of qubits per processor to ensure practical relevance and technical non-triviality. We model distributed quantu...
Twirlator: A Pipeline for Analyzing Subgroup Symmetry Effects in Quantum Machine Learning Ansatzes
Valter Uotila, Väinö Mehtola, Ilmo Salmenperä +1 more·Nov 6, 2025
Symmetry is a strong inductive bias in geometric deep learning and its quantum counterpart, and has attracted increasing attention for improving the trainability of QML models. Yet incorporating symmetries into quantum machine learning (QML) ansatzes...
Local quantum coherence with intersource interactions at nonzero temperature
Yehor Hudenko, Michal Kolář, Radim Filip +1 more·Nov 6, 2025
Local quantum coherence in a two-level system (TLS) is typically generated via time-dependent driving. However, it can also emerge autonomously from symmetry-breaking interactions between the TLS and its surrounding environment at a low temperature. ...
Engineered Robustness for Nonadiabatic Geometric Quantum Gates
Xuan Zhang, XIao-le Li, Jingjing Niu +2 more·Nov 6, 2025
While geometric quantum gates are often theorized to possess intrinsic resilience to control errors by exploiting the global properties of evolution paths, this promise has not consistently translated into practical robustness. We present a streamlin...
High-Tc superconductivity above 130 K in cubic MH4 compounds at ambient pressure
Xinxin Li, Weishuo Xu, Zengguang Zhou +6 more·Nov 6, 2025
Hydrides have long been considered promising candidates for achieving room-temperature superconductivity; however, the extremely high pressures typically required for high critical temperatures remain a major challenge in experiment. Here, we propose...
Implementing Grover Algorithm on Quantum Chip Architecture Optimized with QGHNN for Fidelity and Entanglement Preservation
Ahmad Salmanogli, Hesam Zandi·Nov 6, 2025
This study introduces a superconducting quantum chip architecture designed to simultaneously preserve entanglement and readout fidelity, addressing one of the key trade-offs in the development of scalable quantum hardware. In conventional quantum cir...
Quantum Key Distribution via Charge Teleportation
Amir Yona, Yaron Oz·Nov 6, 2025
We demonstrate that charge teleportation serves as a superior observable for Quantum Energy Teleportation (QET)-based cryptographic primitives. While following the LOCC protocol structure of earlier proposals, we show that decoding key bits via local...
Two-exponential decay of Acridine Orange
Francesco Giacosa, Anna Kolbus, Krzysztof Kyziol +4 more·Nov 6, 2025
In this work, we experimentally study the fluorescence decay of Acridine Orange at late times, in order to test whether a late-time power-law behaviour emerges, a feature expected to be very small but consistent with quantum mechanical and quantum fi...
Expectation-Realization Interpretation of Quantum Superposition
Yanting Wang·Nov 6, 2025
By comparing Schrödinger's cat with its classical counterpart, I show that a quantum superposition should be understood as an expectation over possible eigenstates weighted by wave-like probabilities. Upon the occurrence of a certain event, the quant...
Unified Effective Field Theory for Nonlinear and Quantum Optics
Xiaochen Liu, Ken-Tye Yong·Nov 6, 2025
Predicting phenomena that mix few-photon quantum optics with strong field nonlinear optics is hindered by the use of separate theoretical formalisms for each regime. We close this gap with a unified effective field theory valid for frequencies lower ...
Controllable Non-Hermitianity in Continuous-Variable Qubits
Ke-Xiong Yan, Zhi-Cheng Shi, Ye-Hong Chen +1 more·Nov 6, 2025
Pure dephasing is the dominant leak mechanism in photonic cat qubits because its phase errors disrupt the parity protection, rendering the qubit vulnerable to energy relaxation. In this manuscript, we reveal that this dephasing mechanism conceals an ...
Unifying contextual advantages in state discrimination
Kieran Flatt, Joonwoo Bae·Nov 6, 2025
Quantum state discrimination, alongside its other applications, has recently found use as a tool for witnessing generalised contextuality. In this article, we derive noncontextuality inequalities for both conclusive and inconclusive outcomes across v...