Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Exponential quantum speedups for near-term molecular electronic structure methods
Oskar Leimkuhler, K. Birgitta Whaley·Mar 26, 2025
We prove classical simulation hardness, under the generalized $\mathsf{P}\neq\mathsf{NP}$ conjecture, for quantum circuit families with applications in near-term chemical ground state estimation. The proof exploits a connection to particle number con...
Covert Entanglement Generation and Secrecy
Ohad Kimelfeld, Boulat A. Bash, Uzi Pereg·Mar 26, 2025
We determine the covert capacity for entanglement generation over a noisy quantum channel. While secrecy guarantees that the transmitted information remains inaccessible to an adversary, covert communication ensures that the transmission itself remai...
Quantum advantage for learning shallow neural networks with natural data distributions
Laura Lewis, Dar Gilboa, Jarrod R. McClean·Mar 26, 2025
Without large quantum computers to empirically evaluate performance, theoretical frameworks such as the quantum statistical query (QSQ) are a primary tool to study quantum algorithms for learning classical functions and search for quantum advantage i...
Additivity, Haag duality, and non-invertible symmetries
Shu-Heng Shao, Jonathan Sorce, Manu Srivastava·Mar 26, 2025
The algebraic approach to quantum field theory focuses on the properties of local algebras, whereas the study of (possibly non-invertible) global symmetries emphasizes global aspects of the theory and spacetime. We study connections between these two...
Improving Variational Quantum Circuit Optimization via Hybrid Algorithms and Random Axis Initialization
Joona V. Pankkonen, Lauri Ylinen, Matti Raasakka +1 more·Mar 26, 2025
Variational quantum circuits (VQCs) are an essential tool in applying noisy intermediate-scale quantum computers to practical problems. VQCs are used as a central component in many algorithms, for example, in quantum machine learning, optimization, a...
A decision-theoretic approach to dealing with uncertainty in quantum mechanics
Keano De Vos, Gert de Cooman, Alexander Erreygers +1 more·Mar 26, 2025
We provide a decision-theoretic framework for dealing with uncertainty in quantum mechanics. This uncertainty is two-fold: on the one hand there may be uncertainty about the state the quantum system is in, and on the other hand, as is essential to qu...
Quantum Signatures of Chaos from Free Probability
Hugo A. Camargo, Yichao Fu, Viktor Jahnke +2 more·Mar 26, 2025
A classical dynamical system can be viewed as a probability space equipped with a measure-preserving time evolution map, admitting a purely algebraic formulation in terms of the algebra of bounded functions on the phase space. Similarly, a quantum dy...
Energy shortcut of N-level quantum protocols by optimal control
C. L. Latune, M. B. Puthuveedu Shebeek, D. Sugny +1 more·Mar 26, 2025
We introduce an energetically-optimal method inspired from Shortcut-To-Adiabaticity (STA) processes, named Quantum-Optimal-Shortcut-To-Energetics (QOSTE). QOSTE produces the same transformation as STA for a given protocol used in quantum technologies...
Digital quantum magnetism on a trapped-ion quantum computer
Reza Haghshenas, Eli Chertkov, Michael Mills +56 more·Mar 26, 2025
Digital quantum matter -- realized when discrete quantum gates approximate continuous time evolution -- is susceptible to heating into chaotic, structureless states. If digitization errors are adequately suppressed, a long-lived transient regime of a...
Problem-Structure-Informed Quantum Approximate Optimization Algorithm for Large-Scale Unit Commitment with Limited Qubits
Jingxian Zhou, Ziqing Zhu, Linghua Zhu +1 more·Mar 26, 2025
As power systems expand, solving the Unit Commitment Problem (UCP) becomes increasingly challenging due to the dimensional catastrophe, and traditional methods often struggle to balance computational efficiency and solution quality. To tackle this is...
Quantum Max d-Cut via qudit swap operators
I. Klep, Tea vStrekelj, Jurij Volvcivc·Mar 26, 2025
Quantum Max Cut (QMC) problem for systems of qubits is an example of a 2-local Hamiltonian problem, and a prominent paradigm in computational complexity theory. This paper investigates the algebraic structure of a higher-dimensional analog of the QMC...
Filter-enhanced adiabatic quantum computing on a digital quantum processor
Erenay Karacan, Conor Mc Keever, M. Foss-Feig +2 more·Mar 26, 2025
Eigenstate filters underpin near-optimal quantum algorithms for ground state preparation. Their realization on current quantum computers, however, poses a challenge as the filters are typically represented by deep quantum circuits. Additionally, sinc...
Fast and Noise-aware Machine Learning Variational Quantum Eigensolver Optimiser
Akib Karim, Shaobo Zhang, Muhammad Usman·Mar 26, 2025
The Variational Quantum Eigensolver (VQE) is a hybrid quantum-classical algorithm for preparing ground states in the current era of noisy devices. The classical component of the algorithm requires a large number of measurements on intermediate parame...
Variational Quantum Algorithms in the era of Early Fault Tolerance
Siddharth Dangwal, Suhas Vittal, L. M. Seifert +2 more·Mar 26, 2025
Quantum computing roadmaps predict the availability of 10,000-qubit devices within the next 3–5 years. With projected two-qubit error rates of 0.1%, these systems will enable certain operations under quantum error correction (QEC) using lightweight c...
Certified randomness using a trapped-ion quantum processor
Minzhao Liu, R. Shaydulin, Pradeep Niroula +29 more·Mar 26, 2025
Although quantum computers can perform a wide range of practically important tasks beyond the abilities of classical computers1,2, realizing this potential remains a challenge. An example is to use an untrusted remote device to generate random bits t...
High-efficiency vertical emission spin-photon interface for scalable quantum memories
Siavash Mirzaei-Ghormish, Jeddy Bennett, Ryan M. Camacho·Mar 25, 2025
We present an efficient spin-photon interface for free-space vertical emission coupling. Using a \rev{dipole model}, we show that our design achieves a far-field collection efficiency of 96\% at the numerical aperture of 0.7 with a 95\% overlap to a ...
Predicted third-order sweet spots for phi-junction Josephson parametric amplifiers
Tasnum Reza, Sergey M. Frolov·Mar 25, 2025
Hybrid superconductor-semiconductor nanowire Josephson junctions exhibit skewed and phi-shifted current phase relations when an in-plane magnetic field is applied along the weak link's spin-orbit effective field direction. These junctions can have an...
Collapse-based models for gravity do not violate the entanglement-based witness of non-classicality
Tianfeng Feng, Vlatko Vedral, Chiara Marletto·Mar 25, 2025
It is known that an entanglement-based witness of non-classicality can be applied to testing quantum effects in gravity. Specifically, if a system can create entanglement between two quantum probes by local means only, then it must be non-classical. ...
Spin models from nonlinear cellular automata
Konstantinos Sfairopoulos, Luke Causer, Jamie F. Mair +2 more·Mar 25, 2025
We study classical and quantum spin models derived from one-dimensional cellular automata (CA) with nonlinear update rules, focusing on rules 30, 54 and 201. We argue that the classical models, defined such that their ground states correspond to allo...
Versatile Cross-platform Compilation Toolchain for Schrödinger-style Quantum Circuit Simulation
Yuncheng Lu, Shuang Liang, Hongxiang Fan +3 more·Mar 25, 2025
While existing quantum hardware resources have limited availability and reliability, there is a growing demand for exploring and verifying quantum algorithms. Efficient classical simulators for high-performance quantum simulation are critical to meet...