Papers
Live trends in quantum computing research, updated daily from arXiv.
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Entanglement protection induced by mixed noise
Tengtao Guo, Yuxuan Zhou, Jiahui Feng +2 more·Dec 27, 2025
Contrary to the conventional view that noise is detrimental, we show that mixed noise can protect entanglement in a two-atom-cavity system. Specifically, the leakage of the cavity and the stochastic atom-cavity couplings are modeled as two types of n...
Operational entanglement of collective quantum modes at room temperature
Shalender Singh, Santosh Kumar·Dec 27, 2025
Quantum entanglement is commonly assumed to be fragile at ambient temperature and over macroscopic distances, where thermal noise and dissipation are expected to rapidly suppress nonclassical correlations. Here we show that this intuition fails for c...
Spacetime Spins: Statistical mechanics for error correction with stabilizer circuits
Cory T. Aitchison, Benjamin Béri·Dec 26, 2025
A powerful method for analyzing quantum error-correcting codes is to map them onto classical statistical mechanics models. Such mappings have thus far mostly focused on static codes, possibly subject to repeated syndrome measurements. Recent progress...
GaDE -- GPU-acceleration of time-dependent Dirac Equation for exascale
Johanne Elise Vembe, Marcin Krotkiewski, Magnar Bjørgve +2 more·Dec 25, 2025
Modern heterogeneous high-performance computing (HPC) systems powered by advanced graphics processing unit (GPU) architectures enable accelerating computing with unprecedented performance and scalability. Here, we present a GPU-accelerated solver for...
Hybrid Quantum Repeater Chains with Atom-based Quantum Processing Units and Quantum Memory Multiplexers
Shin Sun, Daniel Bhatti, Shaobo Gao +2 more·Dec 25, 2025
Quantum repeaters enable the generation of reliable entanglement across long distances despite the underlying channel noise. Nevertheless, realizing quantum repeaters poses a difficult engineering challenge due to various device constraints and desig...
Quantum computation of mass gap in an asymptotically free theory
Paulo F. Bedaque, Edison M. Murairi, Gautam Rupak +1 more·Dec 24, 2025
In relativistic field theories, the mass spectrum is given by the difference between the energy of the vacuum and the excited states. Near the continuum limit, the cancellation between these two values leads to loss of precision. We propose a method ...
Quantum Homotopy Algorithm for Solving Nonlinear PDEs and Flow Problems
Sachin S. Bharadwaj, Balasubramanya Nadiga, Stephan Eidenbenz +1 more·Dec 24, 2025
Quantum algorithms to integrate nonlinear PDEs governing flow problems are challenging to discover but critical to enhancing the practical usefulness of quantum computing. We present here a near-optimal, robust, and end-to-end quantum algorithm to so...
Precise quantum control of unidirectional field-free molecular orientation
Qian-Qian Hong, Zhe-Jun Zhang, Chuan-Cun Shu +3 more·Dec 24, 2025
The capability to control molecular rotation for field-free orientation, which arranges molecules in specific spatial directions without external fields, is crucial in physics, chemistry, and quantum information science. However, conventional methods...
Tutorial on Superconducting Quantum Circuits: From Basics to Applications
Denys Derlian Carvalho Brito, Fernando Valadares, André Jorge Carvalho Chaves·Dec 24, 2025
As superconducting circuits emerge as a leading platform for scalable quantum information processing, building comprehensive bridges from the foundational principles of macroscopic quantum phenomena to the architecture of modern quantum devices is in...
Quantum algorithm for Ewald summation based computation of long-range electrostatics
Mansur Ziiatdinov, Igor Novikov, Farid Ablayev +1 more·Dec 24, 2025
In computational molecular science, calculation of electrostatic interactions involving charged atoms - the strongest interactions in condensed phases, is a major bottleneck. We propose a quantum-classical algorithm for fast, yet, accurate computatio...
Using bosons to improve resource efficiency of quantum simulation of vibronic molecular dynamics
Henry L. Nourse, Vanessa C. Olaya-Agudelo, Ivan Kassal·Dec 23, 2025
Simulating chemical dynamics is computationally challenging, especially for nonadiabatic dynamics, where numerically exact classical simulations scale exponentially with system size, becoming intractable for even small molecules. On quantum computers...
Towards City-Scale Quantum Timing: Wireless Synchronization via Quantum Hubs
Mohammad Taghi Dabiri, Mazen Hasna, Rula Ammuri +2 more·Dec 23, 2025
This paper presents a novel wireless quantum synchronization framework tailored for city-scale deployment using entangled photon pairs and passive corner cube retroreflector (CCR) arrays. A centralized quantum hub emits entangled photons, directing o...
Systematic Construction of Time-Dependent Hamiltonians for Microwave-Driven Josephson Circuits
Yao Lu, Tianpu Zhao, André Vallières +13 more·Dec 23, 2025
Time-dependent electromagnetic drives are fundamental for controlling complex quantum systems, including superconducting Josephson circuits. In these devices, accurate time-dependent Hamiltonian models are imperative for predicting their dynamics and...
Single-LED-pumped, room-temperature, solid-state maser
Michael Newns, Shirley Xu, Mingyang Liu +5 more·Dec 23, 2025
Through their ability to achieve cryogenic levels of noise performance while operating at room temperature, optically-pumped, solid-state (OPSS) masers show great promise as quantum sensors, oscillators, and amplifiers. We here demonstrate maser osci...
Rényi-like entanglement probe of the chiral central charge
Julian Gass, Michael Levin·Dec 23, 2025
We propose a ground state entanglement probe for gapped, two-dimensional quantum many-body systems that involves taking powers of reduced density matrices in a particular geometric configuration. This quantity, which we denote by $ω_{α,β}$, is parame...
Experimental characterization of the Toffoli gate via channel spectrum benchmarking
D. K. Korliakov, B. I. Bantysh, A. S. Borisenko +2 more·Dec 23, 2025
Channel spectrum benchmarking (CSB) provides a robust framework for characterizing quantum gate fidelities while remaining insensitive to state preparation and measurement (SPAM) errors. Yet, current CSB implementations encounter fundamental challeng...
Quantum Bayesian Optimization for the Automatic Tuning of Lorenz-96 as a Surrogate Climate Model
Paul J. Christiansen, Daniel Ohl de Mello, Cedric Brügmann +6 more·Dec 23, 2025
In this work, we propose a hybrid quantum-inspired heuristic for automatically tuning the Lorenz-96 model -- a simple proxy to describe atmospheric dynamics, yet exhibiting chaotic behavior. Building on the history matching framework by Lguensat et a...
Lie algebra-assisted quantum simulation and quantum optimal control via high-order Magnus expansions
R. F. dos Santos, S. J. J. M. F. Kokkelmans·Dec 23, 2025
The evolution of a quantum system under time-dependent driving exhibits phenomena that are absent in its stationary counterpart. However, the high dimensionality and non-commutative nature of quantum dynamics make this a challenging problem. The Magn...
Disorder-induced broadening of quantum momentum distribution
Vili Heinonen, Jani Lukkarinen·Dec 23, 2025
We study the long-time behavior of a non-interacting two-dimensional quantum gas in a weak random potential with long-range correlations. Any peaked initial momentum distribution will eventually become isotropic and broaden due to scattering events w...
Bell-Inequality Violation for Continuous, Non-Projective Measurements
Shalender Singh, Santosh Kumar·Dec 23, 2025
Many solid-state quantum platforms do not permit sharp, projective measurements but instead yield continuous voltage or field traces under weak, non-demolition readout. In such systems, standard Bell tests based on dichotomic projective measurements ...