Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
High-throughput bidirectional electro-optic transduction assessed with a practical quantum capacity
M. D. Urmey, S. Dickson, K. Adachi +7 more·Jul 14, 2025
A microwave-optical transducer of sufficiently low noise and high signal transfer rate would allow entanglement to be distributed between superconducting quantum processors reliably within the lifetimes of their quantum memories. To clarify the multi...
Enhancing Decoding Performance using Efficient Error Learning
Pavithran Iyer, Aditya Jain, Stephen D. Bartlett +1 more·Jul 11, 2025
Lowering the resource overhead needed to achieve fault-tolerant quantum computation is crucial to building scalable quantum computers. We show that adapting conventional maximum likelihood (ML) decoders to a small subset of efficiently learnable phys...
Routing Quantum Control of Causal Order
Maarten Grothus, A. Abbott, Augustin Vanrietvelde +1 more·Jul 11, 2025
In recent years, various frameworks have been proposed for the study of quantum processes with indefinite causal order. In particular, quantum circuits with quantum control of causal order (QC-QCs) form a broad class of physical supermaps obtained fr...
Quantum register based on double quantum dots in semiconductor nanowires
V. Vyurkov, Leonid Fedichkin, I. Semenikhin +3 more·Jul 11, 2025
An implementation of a universal solid-state quantum register based on electron space states in field-defined double quantum dots (DQD possesses one electron in two adjacent tunnel bound dots) in an ultrathin semiconductor nanowire is discussed. To s...
A Neural-Guided Variational Quantum Algorithm for Efficient Sign Structure Learning in Hybrid Architectures
Mengzhen Ren, Yu-Cheng Chen, Yangsen Ye +3 more·Jul 10, 2025
Variational quantum algorithms hold great promise for unlocking the power of near-term quantum processors, yet high measurement costs, barren plateaus, and challenging optimization landscapes frequently hinder them. Here, we introduce sVQNHE, a neura...
Emergent Harmonics in Josephson Tunnel Junctions Due to Series Inductance
Junghyun Kim, Max Hays, Ilan T. Rosen +11 more·Jul 10, 2025
Josephson tunnel junctions are essential elements of superconducting quantum circuits. The operability of these circuits presumes a $2\pi$-periodic sinusoidal potential of a tunnel junction, but higher-order corrections to this Josephson potential, o...
Photonic quantum information with time-bins: Principles and applications
Ashutosh Singh, A. Sethia, Leili Esmaeilifar +4 more·Jul 10, 2025
Long-range quantum communication, distributed quantum computing, and sensing applications require robust and reliable ways to encode transmitted quantum information. In this context, time-bin encoding has emerged as a promising candidate due to its r...
Gate Freezing Method for Gradient-Free Variational Quantum Algorithms in Circuit Optimization
Joona V. Pankkonen, L. Ylinen, M. Raasakka +2 more·Jul 10, 2025
Parameterized quantum circuits (PQCs) are pivotal components of variational quantum algorithms (VQAs), which represent a promising pathway to quantum advantage in noisy intermediate-scale quantum (NISQ) devices. PQCs enable flexible encoding of quant...
Predict and Conquer: Navigating Algorithm Trade-Offs with Quantum Design Automation
Simon Thelen, Wolfgang Mauerer·Jul 9, 2025
Combining quantum computers with classical compute power has become a standard means for developing algorithms and heuristics that are, eventually, supposed to beat any purely classical alternatives. While in-principle advantages for solution quality...
Relaying Quantum Information
Yigal Ilin, Uzi Pereg·Jul 9, 2025
Quantum relays are central to both quantum communication and distributed quantum computing, enabling long-distance transmission and modular architectures. Unlike classical repeaters, quantum repeaters preserve coherence without amplifying quantum inf...
Extracting filtered signal statistics of continuously measured quantum systems
Anthony Kiely, Gabriel T. Landi·Jul 8, 2025
The joint state of a continuously monitored quantum system and the classical filtered measurement record has recently been shown to be described by a quantum Fokker-Planck master equation [Phys. Rev. Lett. 129, 050401 (2022)]. We present a determinis...
Low-depth quantum error correction via three-qubit gates in Rydberg atom arrays
Laura Pecorari, Sven Jandura, Guido Pupillo·Jul 8, 2025
Quantum error correction (QEC) requires the execution of deep quantum circuits with large numbers of physical qubits to protect information against errors. Designing protocols that can reduce gate and space-time overheads of QEC is therefore crucial ...
A Conservative Theory of Semiclassical Gravity
Francisco Pipa·Jul 7, 2025
We argue that semiclassical gravity can be made consistent if quantum systems source gravity only when they participate in non-gravitational interactions that lead to environment-induced decoherence. Outside such decoherence-based events, systems do ...
From Wavefunctional Entanglement to Entangled Wavefunctional Degrees of Freedom
Aniruddha Bhattacharya·Jul 7, 2025
The question of whether entanglement between photons is equivalent to entanglement between their characteristic field modes, specifically, the single-particle wavefunctions that are composed and superposed to describe particles in such modes, is a ke...
Machine-Learning-Enhanced Entanglement Detection Under Noisy Quantum Measurements
Mahmoud Mahdian, Ali Babapour-Azar, Zahra Mousavi +1 more·Jul 7, 2025
Quantum measurements are inherently noisy, hindering reliable entanglement detection and limiting the scalability of quantum technologies. While error mitigation and correction strategies exist, they often impose prohibitive resource overheads. Here,...
Universal shape-dependence of quantum entanglement in disordered magnets
Natalie Love, István A. Kovács·Jul 6, 2025
Disordered quantum magnets are not only experimentally relevant, but offer efficient computational methodologies to calculate the low energy states as well as various measures of quantum correlations. Here, we present a systematic analysis of quantum...
Perspectives on Utilization of Measurements in Quantum Algorithms
Valter Uotila, I. Salmenperá, Leo Becker +3 more·Jul 6, 2025
Measurement is a fundamental operation in quantum computing and has many important use cases in quantum algorithms. This article provides a comprehensive overview of the basic measurement operations in quantum computing and represents a selected set ...
One application of Duistermaat-Heckman measure in quantum information theory
Lin Zhang, Xiaohan Jiang, Bing Xie·Jul 3, 2025
While the exact separability probability of 8/33 for two-qubit states under the Hilbert-Schmidt measure has been reported by Huong and Khoi [\href{https://doi.org/10.1088/1751-8121/ad8493}{J.Phys.A:Math.Theor.{\bf57}, 445304(2024)}], detailed derivat...
An Ultra-Cold Mechanical Quantum Sensor for Tests of New Physics
Andraz Omahen, Simon Storz, Marius Bild +3 more·Jul 3, 2025
Initialization of mechanical modes in the quantum ground state is crucial for their use in quantum information and quantum sensing protocols. In quantum processors, impurity of the modes'initial state affects the infidelity of subsequent quantum algo...
Complexity of learning matchings and half graphs via edge queries
Nikhil S. Mande, Swagato Sanyal, V. Zamaraev·Jul 3, 2025
The problem of learning or reconstructing an unknown graph from a known family via partial-information queries arises as a mathematical model in various contexts. The most basic type of access to the graph is via \emph{edge queries}, where an algorit...