Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
High-dimensional detection-loophole-free measurement-device-independent quantum random number generator
Joakim Argillander, Daniel Spegel-Lexne, Martin Clason +4 more·Oct 7, 2025
Certifying random number generators is challenging, especially in security-critical fields like cryptography. Here, we demonstrate a measurement-device-independent quantum random number generator (MDI-QRNG) using high-dimensional photonic path states...
Quantum matrix arithmetics with Hamiltonian evolution
Christopher Kang, Yuan Su·Oct 7, 2025
The efficient implementation of matrix arithmetic operations underpins the speedups of many quantum algorithms. We develop a suite of methods to perform matrix arithmetics -- with the result encoded in the off-diagonal blocks of a Hamiltonian -- usin...
An efficient algorithm to compute entanglement in states with low magic
ChunJun Cao, Gong Cheng, Tianci Zhou·Oct 7, 2025
A bottleneck for analyzing the interplay between magic and entanglement is the computation of these quantities in highly entangled quantum many-body magic states. Efficient extraction of entanglement can also inform our understanding of dynamical qua...
Anonymous Quantum Tokens with Classical Verification
Dmytro Gavinsky, Dar Gilboa, Siddhartha Jain +2 more·Oct 7, 2025
The no-cloning theorem can be used as a basis for quantum money constructions which guarantee unconditionally unforgeable currency. Existing schemes, however, either (i) require long-term quantum memory and quantum communication between the user and ...
Quantum Approximate Optimization Algorithm for MIMO with Quantized b-bit Beamforming
Nikos A Mitsiou, Ioannis Krikidis, George K Karagiannidis·Oct 7, 2025
Multiple-input multiple-output (MIMO) is critical for 6G communication, offering improved spectral efficiency and reliability. However, conventional fully digital designs face significant challenges due to high hardware complexity and power consumpti...
Optimised spectral purity of unfiltered photons via pump and nonlinearity shaping
Tommaso Faleo, Christopher L. Morrison, Roméo Beignon +6 more·Oct 7, 2025
Photonic quantum technologies rely on the efficient generation and interference of indistinguishable photons. Exceptional achievements in this respect have been obtained by domain engineering of quasi-phase-matched parametric down-conversion sources,...
Quantum $f$-divergences and Their Local Behaviour: An Analysis via Relative Expansion Coefficients
Shreyas Iyer, Peixue Wu, Paula Belzig +1 more·Oct 7, 2025
Any reasonable measure of distinguishability of quantum states must satisfy a data processing inequality, that is, it must not increase under the action of a quantum channel. We can ask about the proportion of information lost or preserved and this l...
An integrated photonic millimeter-wave receiver with sub-ambient noise
Junyin Zhang, Shuhang Zheng, Jiachen Cai +6 more·Oct 7, 2025
Decades of progress in radiofrequency (RF) transistors and receiver frontends have profoundly impacted wireless communications, remote sensing, navigation, and instrumentation. Growing demands for data throughput in 6G networks, timing precision in p...
Anchor: Reducing Temporal and Spatial Output Performance Variability on Quantum Computers
Yuqian Huo, Daniel Leeds, Jason Ludmir +2 more·Oct 7, 2025
Quantum computing, which has the power to accelerate many computing applications, is currently a technology under development. As a result, the existing noisy intermediate-scale quantum (NISQ) computers suffer from different hardware noise effects, w...
Quantumness and its hierarchies in PT-symmetric down-conversion models
Jan Peřina, Karol Bartkiewicz, Grzegorz Chimczak +4 more·Oct 7, 2025
We investigate the hierarchy of quantum correlations in a quadratic bosonic parity-time-symmetric system (PTSS) featuring distinct dissipation and amplification channels. The hierarchy includes global nonclassicality, entanglement, asymmetric quantum...
Batched high-rate logical operations for quantum LDPC codes
Qian Xu, Hengyun Zhou, Dolev Bluvstein +5 more·Oct 7, 2025
High-rate quantum LDPC (qLDPC) codes reduce memory overhead by densely packing many logical qubits into a single block of physical qubits. Here we extend this concept to high-rate computation by constructing \emph{batched} fault-tolerant operations t...
General diffraction properties of aperiodic slit arrays
Thiago de Souza Ferreira, Daniel Jonathan, Antonio Z. Khoury +1 more·Oct 7, 2025
Fraunhofer diffraction plays a vital role in experimental physics not only because it accurately describes the behaviour of light in the usual propagation limit, but also because it links the diffracted light with the scattering object through one of...
Non-iid hypothesis testing: from classical to quantum
Giacomo De Palma, Marco Fanizza, Connor Mowry +1 more·Oct 7, 2025
We study hypothesis testing (aka state certification) in the non-identically distributed setting. A recent work (Garg et al. 2023) considered the classical case, in which one is given (independent) samples from $T$ unknown probability distributions $...
Self-concordant Schrödinger operators: spectral gaps and optimization without condition numbers
Sander Gribling, Simon Apers, Harold Nieuwboer +1 more·Oct 7, 2025
Spectral gaps play a fundamental role in many areas of mathematics, computer science, and physics. In quantum mechanics, the spectral gap of Schrödinger operators has a long history of study due to its physical relevance, while in quantum computing s...
Quantum Strategies to Overcome Classical Multiplexing Limits
Tzula B. Propp, Jeroen Grimbergen, Emil R. Hellebek +5 more·Oct 7, 2025
Near-term quantum networks face a bottleneck due to low quantum communication rates. This degrades performance both by lowering operating speeds and increasing qubit storage time in noisy memories, making some quantum internet applications infeasible...
On the Quantum Equivalence between $S|LWE\rangle$ and $ISIS$
André Chailloux, Paul Hermouet·Oct 7, 2025
Chen, Liu, and Zhandry [CLZ22] introduced the problems $S|LWE\rangle$ and $C|LWE\rangle$ as quantum analogues of the Learning with Errors problem, designed to construct quantum algorithms for the Inhomogeneous Short Integer Solution ($ISIS$) problem....
Noise-induced decoherence-free zones for anyons
Eric R. Bittner·Oct 7, 2025
We develop a stochastic framework for anyonic systems in which the exchange phase is promoted from a fixed parameter to a fluctuating quantity. Starting from the Stratonovich stochastic Liouville equation, we perform the Stratonovich--Itô conversion ...
Identifying chiral topological order in microscopic spin models by modular commutator
Avijit Maity, Aman Kumar, Vikram Tripathi·Oct 7, 2025
The chiral central charge $c_-$ is a key topological invariant of the edge characterizing the bulk two-dimensional chiral topological order, but its direct evaluation in microscopic spin models has long been a challenge, especially for non-abelian to...
Universal super-resolution framework for imaging of quantum dots
Dominik Vašinka, Jaewon Lee, Charlie Stalker +9 more·Oct 7, 2025
We present a universal deep-learning method that reconstructs super-resolved images of quantum emitters from a single camera frame measurement. Trained on physics-based synthetic data spanning diverse point-spread functions, aberrations, and noise, t...
Quantum Annealing for Realistic Traffic Flow Optimization: Clustering and Data-Driven QUBO
Renáta Rusnáková, Martin Chovanec, Juraj Gazda·Oct 7, 2025
Managing city traffic is a complex NP-hard problem where traditional methods often fail to scale. We present a data-driven approach that reformulates traffic optimization as a Quadratic Unconstrained Binary Optimization, capturing both congestion red...