Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Realistic Threat Models for Fiber and Free-Space Continuous-Variable Quantum Key Distribution
Zhiyue Zuo, Masoud Ghalaii, Stefano Pirandola·Oct 8, 2025
Future global quantum communication networks, or quantum Internet, will realize high-rate secure communication and entanglement distribution for large-scale users over long distances. Continuous variable (CV) quantum key distribution (QKD) provides a...
A Hardware-Efficient Mølmer-Sørensen Gate for Superconducting Quantum Computers
M. AbuGhanem·Oct 8, 2025
The Mølmer-Sørensen gate, a cornerstone entangling operation in trapped-ion systems, represents a promising alternative to standard entangling gates in superconducting quantum architectures. However, its performance on superconducting hardware has re...
Unitary Quantum Cellular Automata for Density Classification
Pedro C. S. Costa, Yuval R. Sanders, Pedro Paulo Balbi +1 more·Oct 8, 2025
We investigate the density classification task (DCT) -- determining the majority bit in a one-dimensional binary lattice -- within a quantum cellular automaton (CA) framework. While there is no one-dimensional two-state, radius $r \geq 1$, determinis...
Fisher Information, Training and Bias in Fourier Regression Models
Lorenzo Pastori, Veronika Eyring, Mierk Schwabe·Oct 8, 2025
Motivated by the growing interest in quantum machine learning, in particular quantum neural networks (QNNs), we study how recently introduced evaluation metrics based on the Fisher information matrix (FIM) are effective for predicting their training ...
Physics-Informed Optimisation of Conveyor Mode Spin Qubit Transport
Andrii Sokolov, Conor Power, Elena Blokhina·Oct 8, 2025
Scalable quantum information processing in spin-based architectures necessitates the a bility to reliably shuttle quantum states across extended device regions with minimal decoherence. In this work, we present a physics-informed algorithm for optimi...
Expressive and Scalable Quantum Fusion for Multimodal Learning
Tuyen Nguyen, Trong Nghia Hoang, Phi Le Nguyen +2 more·Oct 8, 2025
The aim of this paper is to introduce a quantum fusion mechanism for multimodal learning and to establish its theoretical and empirical potential. The proposed method, called the Quantum Fusion Layer (QFL), replaces classical fusion schemes with a hy...
Local energy assignment for two interacting quantum thermal reservoirs
Alessandra Colla, Bassano Vacchini, Andrea Smirne·Oct 8, 2025
Understanding how to assign internal energy, heat, and work in quantum systems beyond weak coupling remains a central problem in quantum thermodynamics, particularly as the difference between competing definitions becomes increasingly relevant. We id...
Quantum Sparse Recovery and Quantum Orthogonal Matching Pursuit
Armando Bellante, Stefano Vanerio, Stefano Zanero·Oct 8, 2025
We study quantum sparse recovery in non-orthogonal, overcomplete dictionaries: given coherent quantum access to a state and a dictionary of vectors, the goal is to reconstruct the state up to $\ell_2$ error using as few vectors as possible. We first ...
The Knowledge Complexity of Quantum Problems
Giulio Malavolta·Oct 8, 2025
Foundational results in theoretical computer science have established that everything provable, is provable in zero knowledge. However, this assertion fundamentally assumes a classical interpretation of computation and many interesting physical state...
Optimizing LOCC Protocols on Product Stiefel Manifold
Ze-Tong Li, Xin Wang·Oct 8, 2025
Local operations and classical communication (LOCC) is a foundational framework in quantum information from both theoretical and experimental perspectives. However, designing and optimizing LOCC protocols is intractable due to their complex structure...
Nonlinear photonic architecture for fault-tolerant quantum computing
Maike Ostmann, Joshua Nunn, Alex E. Jones·Oct 8, 2025
We propose a novel architecture for fault-tolerant quantum computing that incorporates strong single-photon nonlinearities into a photonic GHZ-measurement-based architecture. The nonlinearities substantially reduce resource overheads compared to conv...
On the emergence of quantum Darwinism and pointer states for non-commuting evolutions
Diana A. Chisholm, G. Massimo Palma, Luca Innocenti·Oct 8, 2025
Quantum systems achieve objectivity by redundantly encoding information about themselves into the surrounding environment, through a mechanism known as quantum Darwinism. When this happens, observes measure the environment and infer the system to be ...
Mirrored Entanglement Witnesses for Multipartite and High-Dimensional Quantum Systems
Jiheon Seong, Anindita Bera, Beatrix C. Hiesmayr +2 more·Oct 8, 2025
Entanglement witnesses (EWs) are a versatile tool to detect entangled states and characterize related properties of entanglement in quantum information theory. A witness $W$ corresponds to an observable satisfying $\mathrm{tr}[Wσ_{\mathrm{sep}}]\geq ...
Randomized Quantum Singular Value Transformation
Xinzhao Wang, Yuxin Zhang, Soumyabrata Hazra +3 more·Oct 8, 2025
We introduce the first randomized algorithms for Quantum Singular Value Transformation (QSVT), a unifying framework for many quantum algorithms. Standard implementations of QSVT rely on block encodings of the Hamiltonian, which are costly to construc...
Reconquering Bell sampling on qudits: stabilizer learning and testing, quantum pseudorandomness bounds, and more
Jonathan Allcock, Joao F. Doriguello, Gábor Ivanyos +1 more·Oct 8, 2025
Bell sampling is a simple yet powerful tool based on measuring two copies of a quantum state in the Bell basis, and has found applications in a plethora of problems related to stabiliser states and measures of magic. However, it was not known how to ...
A Quantum Linear Systems Pathway for Solving Differential Equations
Abhishek Setty·Oct 8, 2025
We present a systematic pathway for solving differential equations within the quantum linear systems framework by combining block encoding with Quantum Singular Value Transformation (QSVT). The approach is demonstrated on a complex tridiagonal linear...
Quantum Computing Methods for Malware Detection
Eliška Krátká, Aurél Gábor Gábris·Oct 8, 2025
In this paper, we explore the potential of quantum computing in enhancing malware detection through the application of Quantum Machine Learning (QML). Our main objective is to investigate the performance of the Quantum Support Vector Machine (QSVM) a...
Near-Asymptotically-Good Quantum Codes with Transversal CCZ Gates and Sublinear-Weight Parity-Checks
Louis Golowich, Venkatesan Guruswami·Oct 8, 2025
It is a major challenge to construct good quantum codes supporting fault-tolerant (e.g. transversal) non-Clifford gates with low-weight parity-check measurements. In this paper, we construct the first known quantum codes with linear dimension and dis...
On the complexity of estimating ground state entanglement and free energy
Sevag Gharibian, Jonas Kamminga·Oct 8, 2025
Understanding the entanglement structure of local Hamiltonian ground spaces is a physically motivated problem, with applications ranging from tensor network design to quantum error-correcting codes. To this end, we study the complexity of estimating ...
Breaking the Treewidth Barrier in Quantum Circuit Simulation with Decision Diagrams
Bin Cheng, Ziyuan Wang, Ruixuan Deng +2 more·Oct 8, 2025
Classical simulation of quantum circuits is a critical tool for validating quantum hardware and probing the boundary between classical and quantum computational power. Existing state-of-the-art methods, notably tensor network approaches, have computa...