Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Approximation does not help in quantum unitary time-reversal
Kean Chen, Nengkun Yu, Zhicheng Zhang·Jul 8, 2025
Access to the time-reverse $U^{-1}$ of an unknown quantum unitary process $U$ is widely assumed in quantum learning, metrology, and many-body physics. The fundamental task of unitary time-reversal dictates implementing $U^{-1}$ to within diamond-norm...
Introduction to quantum error correction with stabilizer codes
Zachary P. Bradshaw, Jeffrey J. Dale, Ethan N. Evans·Jul 8, 2025
We give an introduction to the theory of quantum error correction using stabilizer codes that is geared towards the working computer scientists and mathematicians with an interest in exploring this area. To this end, we begin with an introduction to ...
Utility-Scale Quantum Computation of Ground-State Energy in a 100+ Site Planar Kagome Antiferromagnet via Hamiltonian Engineering
Muhammad Ahsan·Jul 8, 2025
We present experimental quantum computation of the ground-state energy in a 103-site flat Kagome lattice under the antiferromagnetic Heisenberg model (KAFH), with IBM's Heron r1 and Heron r2 quantum processors. For spin-1/2 KAFH, our per-site ground-...
Trainability of Quantum Models Beyond Known Classical Simulability
S. Meyer, Francesco Scala, F. Tacchino +1 more·Jul 8, 2025
Variational Quantum Algorithms (VQAs) are promising candidates for near-term quantum computing, yet they face scalability challenges due to barren plateaus, where gradients vanish exponentially in the system size. Recent conjectures suggest that avoi...
Unified Framework for Quantum Code Embedding
Andrew C. Yuan·Jul 7, 2025
Given a Calderbank-Shor-Steane (CSS) code, it is sometimes necessary to modify the code by adding an arbitrary number of physical qubits and parity checks. Motivations may include concatenating codes, embedding low-density parity check (LDPC) codes i...
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 ...
Quantum Quasinormal Mode Theory for Dissipative Nano-Optics and Magnetodielectric Cavity Quantum Electrodynamics
Lars Meschede, Daniel D. A. Clarke, Ortwin Hess·Jul 7, 2025
The unprecedented pace of evolution in nanoscale architectures for cavity quantum electrodynamics (cQED) has posed crucial challenges for theory, where the quantum dynamics arising from the non-perturbative dressing of matter by cavity electric and m...
Disentangling strategies and entanglement transitions in unitary circuit games with matchgates
Raúl Morral-Yepes, Marc Langer, Adam Gammon-Smith +2 more·Jul 7, 2025
In unitary circuit games, two competing parties, an "entangler" and a "disentangler", can induce an entanglement phase transition in a quantum many-body system. The transition occurs at a certain rate at which the disentangler acts. We analyze such g...
Multiresonator quantum memory with atomic ensembles
S. A. Moiseev·Jul 7, 2025
The theory of multiresonator quantum memory with atomic ensembles has been developed. Using the obtained analytical solutions, the basic physical properties of such memory are analyzed and optimal conditions for its implementation are determined. Adv...
Variational quantum algorithm for generalized eigenvalue problems of non-Hermitian systems
Jiaxin Li, Zhaobing Fan, Hongmei Yao +5 more·Jul 7, 2025
Non-Hermitian generalized eigenvalue problems (GEPs) play a significant role in many practical applications, such as mechanical engineering. Based on the generalized Schur decomposition, we propose a variational quantum algorithm for solving the GEPs...
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...
Experimental data re-uploading with provable enhanced learning capabilities
Martin F. X. Mauser, Solene Four, Lena Marie Predl +7 more·Jul 7, 2025
The last decades have seen the development of quantum machine learning, stemming from the intersection of quantum computing and machine learning. This field is particularly promising for the design of alternative quantum (or quantum inspired) computa...
Quantum-Assisted Gaussian Process Regression Using Random Fourier Features
Cristian A. Galvis-Florez, Ahmad Farooq, Simo Särkkä·Jul 7, 2025
Probabilistic machine learning models are distinguished by their ability to integrate prior knowledge of noise statistics, smoothness parameters, and training data uncertainty. A common approach involves modeling data with Gaussian processes; however...
Asymptotically Good Quantum Codes with Addressable and Transversal Non-Clifford Gates
Zhiyang He, Vinod Vaikuntanathan, Adam Wills +1 more·Jul 7, 2025
Constructing quantum codes with good parameters and useful transversal gates is a central problem in quantum error correction. In this paper, we continue our work in arXiv:2502.01864 and construct the first family of asymptotically good quantum codes...
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,...
Electron-molecule scattering via R-matrix variational algorithms on a quantum computer
D. Picozzi, Jonathan Tennyson, V. Graves +1 more·Jul 7, 2025
Electron--molecule collisions play a central role in both natural processes and modern technological applications, particularly in plasma processing. Conventional computational strategies such as the R-matrix method have been widely adopted yet encou...
Quantum-Inspired Tensor-Network Fractional-Step Method for Incompressible Flow in Curvilinear Coordinates
Nis-Luca van Hulst, Pia Siegl, Paul Over +5 more·Jul 7, 2025
We introduce an algorithmic framework based on tensor networks for computing fluid flows around immersed objects in curvilinear coordinates. We show that the tensor network simulations can be carried out solely using highly compressed tensor represen...
Special-Unitary Parameterization for Trainable Variational Quantum Circuits
Kuan-Cheng Chen, H. Tseng, Samuel Yen-Chi Chen +2 more·Jul 7, 2025
We propose SUN-VQC, a variational-circuit architecture whose elementary layers are single exponentials of a symmetry-restricted Lie subgroup, $\text{SU}\left(2^{k}\right) \subset \text{SU}\left(2^{n}\right)$ with $k \ll n$. Confining the evolution to...
DYNAMO: Dynamic Neutral Atom Multi-programming Optimizer Towards Quantum Operating Systems
Wenjie Sun, Xiaoyu Li, Zhigang Wang +3 more·Jul 7, 2025
As quantum computing advances towards practical applications, quantum operating systems become inevitable, where multi-programming -- the core functionality of operating systems -- enables concurrent execution of multiple quantum programs to enhance ...
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...