Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
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...
Generalized tensor transforms and their applications in classical and quantum computing
Alok Shukla, P. Vedula·Jul 3, 2025
We introduce a novel framework for Generalized Tensor Transforms (GTTs), constructed through an $n$-fold tensor product of an arbitrary $b \times b$ unitary matrix $W$. This construction generalizes many established transforms, by providing a adaptab...
Photon number projective measurement in Schrödinger cat quantum state preparation procedure after parametric down-conversion interaction
V. L. Gorshenin·Jul 2, 2025
Schrödinger-cat (SC) states are an important resource for continuous-variable quantum computing and quantum metrology. In our previous work [JOSA B, 42, 2 (2025)], we proposed a probabilistic protocol for generating bright squeezed SC states via dege...
Classification of four-qubit pure codes and five-qubit absolutely maximally entangled states
Ian Tan·Jul 2, 2025
We prove that every 5-qubit absolutely maximally entangled (AME) state is equivalent by a local unitary transformation to a point in the unique ((5,2,3)) quantum error correcting code C. Furthermore, two points in C are equivalent if and only if they...
Efficient Characterization of Coherent and Correlated Low-Degree Noise in Layers of Gates
Marianna Crupi, J. Ignacio Cirac, Flavio Baccari·Jul 2, 2025
We present a quantum process-tomography protocol based on a low-degree ansatz for the quantum channel, i.e. when it can be expressed as a fixed-degree polynomial in terms of Pauli operators. We demonstrate how to perform tomography of such channels w...
Laser cooling and qubit measurements on a forbidden transition in neutral Cs atoms
J. Scott, H. M. Lim, U. Singla +6 more·Jul 2, 2025
We experimentally demonstrate background-free, hyperfine-level-selective measurements of individual Cs atoms by simultaneous cooling to $5.3~μ\rm K$ and imaging on the $6s_{1/2}\rightarrow 5d_{5/2}$ electric-quadrupole transition. We achieve hyperfin...
An exact Markovian decoherence dynamics of two interacting harmonic oscillators coupled to a bosonic heat bath
Gábor Homa, Dávid Hamar, József Zsolt Bernád +2 more·Jul 2, 2025
We present an exact analytical solution of the Hu-Paz-Zhang master equation in a precise Markovian limit for a system of two harmonically coupled harmonic oscillators interacting with a common thermal bath of harmonic oscillators. The thermal bath is...
Fluctuation theorems for multipartite quantum coherence and correlation dynamics
Kun Zhang, Mo-Yang Ni, Hai-Long Shi +2 more·Jul 2, 2025
Fluctuation theorems establish exact relations for nonequilibrium dynamics, profoundly advancing the field of stochastic thermodynamics. In this work, we extend quantum fluctuation theorems beyond the traditional thermodynamic framework to quantum mu...
Surrogate Modeling via Factorization Machine and Ising Model with Enhanced Higher-Order Interaction Learning
Anbang Wang, Dunbo Cai, Yu Zhang +3 more·Jul 2, 2025
Recently, a surrogate model was proposed that employs a factorization machine to approximate the underlying input-output mapping of the original system, with quantum annealing used to optimize the resulting surrogate function. Inspired by this approa...
Quantum phase estimation based filtering: performance analysis and application to low-energy spectral calculation
Rei Sakuma, Kaito Wada, Shu Kanno +5 more·Jul 2, 2025
Filtering is an important technique in quantum computing used for isolating or enhancing some specific states of quantum many-body systems. In this paper, we analyze the performance of filters based on the quantum phase estimation (QPE) algorithm, in...
Improving GANs by leveraging the quantum noise from real hardware
Hongni Jin, Kenneth M. Merz·Jul 2, 2025
We propose a novel approach to generative adversarial networks (GANs) in which the standard i.i.d. Gaussian latent prior is replaced or hybridized with a quantum-correlated prior derived from measurements of a 16-qubit entangling circuit. Each latent...
Fiber transmission of cluster states via multi-level time-bin encoding
Philip Rubeling, Robert Johanning, Jan Heine +2 more·Jul 2, 2025
The next generation of telecommunication networks will rely on the transmission of complex quantum states to enable secure and transformative information processing, utilizing entanglement and superposition. Cluster states - multipartite entangled st...
Bias-tailored single-shot quantum LDPC codes
Shixin Wu, Todd A. Brun, Daniel A. Lidar·Jul 2, 2025
Quantum hardware rarely suffers equal amounts of bit-flip ($X$) and phase-flip ($Z$) errors; one type is often much more common than the other. A code that is ``bias-tailored''can exploit this imbalance, lowering the fault-tolerance overhead. A compl...
Circuit compression for 2D quantum dynamics
Matteo D'Anna, Yuxuan Zhang, R. Wiersema +2 more·Jul 2, 2025
The study of out-of-equilibrium quantum many-body dynamics remains one of the most exciting research frontiers of physics, standing at the crossroads of our understanding of complex quantum phenomena and the realization of quantum advantage. Quantum ...
Analyzing Common Electronic Structure Theory Algorithms for Distributed Quantum Computing
G. Jones, Hans-Arno Jacobsen·Jul 2, 2025
To move towards the utility era of quantum computing, many corporations have posed distributed quantum computing (DQC) as a framework for scaling the current generation of devices for practical applications. One of these applications is quantum chemi...
Towards Quantum-Resistant Trusted Computing: Architectures for Post-Quantum Integrity Verification Techniques
Grazia D'Onghia, Antonio Lioy·Jul 2, 2025
Trust is the core building block of secure systems, and it is enforced via methods to guarantee that a specific system is properly configured and works as expected. In this context, a Root of Trust (RoT) establishes a trusted environment, where both ...
Selective Feature Re-Encoded Quantum Convolutional Neural Network with Joint Optimization for Image Classification
Shaswata Mahernob Sarkar, Sheikh Iftekhar Ahmed, Jishnu Mahmud +2 more·Jul 2, 2025
Quantum Machine Learning (QML) has seen significant advancements, driven by recent improvements in Noisy Intermediate-Scale Quantum (NISQ) devices. Leveraging quantum principles such as entanglement and superposition, quantum convolutional neural net...
Error correction, authentication, and false acceptance, probabilities for communication over noisy quantum channels: converse upper bounds on the bit transmission rate
Pete Rigas·Jul 2, 2025
We obtain strict upper bounds on the bit transmission rate for communication of Classical bit codewords over Quantum channels. Albeit previous arguments in arXiv: 1804.01797 which have demonstrated that lower bounds can be shown to hold for the bit t...
Generative flow-based warm start of the variational quantum eigensolver
Hang Zou, Martin Rahm, A. F. Kockum +1 more·Jul 2, 2025
Hybrid quantum-classical algorithms like the variational quantum eigensolver (VQE) show promise for quantum simulations on near-term quantum devices, but are often limited by complex objective functions and expensive optimization procedures. Here, we...
Passive quantum interconnects: multiplexed remote entanglement generation with cavity-assisted photon scattering
Seigo Kikura, Kazufumi Tanji, Akihisa Goban +1 more·Jul 1, 2025
We propose a time- and wavelength-multiplexed remote atom-atom entanglement generation protocol based on cavity-assisted photon scattering (CAPS). This is designed to achieve a high rate and high fidelity with robustness to operational imperfections,...