Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
General framework for quantifying entanglement production in ultracold molecular collisions and chemical reactions
Adrien Devolder, Paul Brumer, Timur Tscherbul·Jan 23, 2026
Entanglement, a defining feature of quantum mechanics, arises naturally from interactions between molecular systems. Yet the precise nature and quantification of entanglement in the products of molecular collisions and reactions remain largely unexpl...
Formalising an operational continuum limit of quantum combs
Clara Wassner, Jonáš Fuksa, Jens Eisert +1 more·Jan 23, 2026
Quantum combs are powerful conceptual tools for capturing multi-time processes in quantum information theory, constituting the most general quantum mechanical process. But, despite their causal nature, they lack a meaningful physical connection to ti...
Autonomous Optical Alignment of Satellite-Based Entanglement Sources using Reinforcement Learning
Andrzej Gajewski, Robert Okuła, Marcin Pawłowski +1 more·Jan 23, 2026
Quantum entanglement distributed via satellites enable global-scale quantum communication. However, onboard sources are susceptible to misalignment due to dynamical orbital conditions. Here, we present two recalibration techniques for efficient gener...
Engineering discrete local dynamics in globally driven dual-species atom arrays
Francesco Cesa, Andrea Di Fini, David Aram Korbany +4 more·Jan 23, 2026
We introduce a method for engineering discrete local dynamics in globally-driven dual-species neutral atom experiments, allowing us to study emergent digital models through uniform analog controls. Leveraging the new opportunities offered by dual-spe...
Experimental investigation of nonclassicality in the simplest scenario via the degrees of freedom of light
João M. M. Gama, Guilherme T. C. Cruz, Massy Khoshbin +3 more·Jan 23, 2026
In this work, we experimentally investigate the classical-light emulation of different notions of nonclassicality in the simplest scenario. We implement this prepare-and-measure scenario involving four preparations and two binary-outcome measurements...
Boundary critical phenomena in the quantum Ashkin-Teller model
Yifan Liu, Natalia Chepiga, Yoshiki Fukusumi +1 more·Jan 23, 2026
We investigate the boundary critical phenomena of the one-dimensional quantum Ashkin-Teller model using boundary conformal field theory and density matrix renormalization group (DMRG) simulations. Based on the $\mathbb{Z}_2$-orbifold of the $c=1$ com...
Quantum Fisher information analysis for absorption measurements with undetected photons
Martin Houde, Franz Roeder, Christine Silberhorn +2 more·Jan 23, 2026
We theoretically compare the quantum Fisher information (QFI) for three configurations of absorption spectroscopy with undetected idler photons: an SU(1,1) interferometer with inter-source idler loss, an induced-coherence (IC) setup in which the idle...
Upper bounds on the purity of Wigner positive quantum states that verify the Wigner entropy conjecture
Qipeng Qian, Christos Gagatsos·Jan 23, 2026
We present analytical results toward the Wigner entropy conjecture, which posits that among all physical Wigner non-negative states the Wigner entropy is minimized by pure Gaussian states for which it attains the value $1+\lnπ$.Working under a minima...
Quantum Position Verification with Remote Untrusted Devices
Gautam A. Kavuri, Yanbao Zhang, Abigail R. Gookin +16 more·Jan 23, 2026
Many applications require or benefit from being able to securely localize remote parties. In classical physics, adversaries can in principle have complete knowledge of such a party's devices, and secure localization is fundamentally impossible. This ...
Universal classical and quantum fluctuations in the large deviations of current of noisy quantum systems: The case of QSSEP and QSSIP
Mathias Albert, Denis Bernard, Tony Jin +2 more·Jan 23, 2026
We study the fluctuation statistics of integrated currents in noisy quantum diffusive systems, focusing on the Quantum Symmetric Simple Exclusion and Inclusion Processes (QSSEP/QSSIP). These one-dimensional fermionic (QSSEP) and bosonic (QSSIP) model...
Generation of fully phase controlled two-photon entangled states
Ian Ford, Adrien Amour, Matthias Keller·Jan 23, 2026
Control over the internal states of trapped ions makes them the ideal system to generate single and two-photon states. Coupling a single ion to an optical cavity enables efficient emission of single photons into a single spatial mode and grants contr...
Protocols to share genuine multipartite entanglement employing copies of biseparable states
Swati Choudhary, Ujjwal Sen, Saronath Halder·Jan 23, 2026
Sharing genuine multipartite entanglement by considering collective use of copies of biseparable states, which are entangled across all bipartitions but lack genuine multipartite entanglement at the single-copy level, plays a central role in several ...
Harnessing Quantum Computing for Energy Materials: Opportunities and Challenges
Seongmin Kim, In-Saeng Suh, Travis S. Humble +3 more·Jan 23, 2026
Developing high-performance materials is critical for diverse energy applications to increase efficiency, improve sustainability and reduce costs. Classical computational methods have enabled important breakthroughs in energy materials development, b...
Investigating Retargetability Claims for Quantum Compilers
Luke Southall, Joshua Ammermann, Rinor Kelmendi +2 more·Jan 23, 2026
In the NISQ-era, there is a wide variety of hardware manufacturers building quantum computers. Each of these companies may choose different approaches and hardware architectures for their machines. This poses a problem for quantum software engineerin...
Z2 Lattice Gauge Theory on Non-trivial Topology and Its Quantum Simulation
Jiaqi Hu, Shu Tian, Xiaopeng Cui +3 more·Jan 23, 2026
Wegner duality is essential for Z2 lattice gauge theory, yet the duality on non-trivial topologies has remained implicit. We extend Wegner duality to arbitrary topology and dimension, obtaining a new class of Ising models, in which topology is encode...
Noise Resilience and Robust Convergence Guarantees for the Variational Quantum Eigensolver
Mirko Legnini, Julian Berberich·Jan 23, 2026
Variational Quantum Algorithms (VQAs) are a class of hybrid quantum-classical algorithms that leverage on classical optimization tools to find the optimal parameters for a parameterized quantum circuit. One relevant application of VQAs is the Variati...
Moderate-terahertz-induced plateau expansion of high-order harmonic generation to soft X-ray region
Doan-An Trieu, Duong D. Hoang-Trong, Cam-Tu Le +5 more·Jan 23, 2026
Extending the high-harmonic cutoff with experimentally accessible fields is essential for advancing tabletop coherent extreme ultraviolet (EUV) and soft X-ray sources. Although terahertz (THz) assistance offers a promising route, cutoff extension at ...
SeeMPS: A Python-based Matrix Product State and Tensor Train Library
Paula García-Molina, Juan José Rodríguez-Aldavero, Jorge Gidi +1 more·Jan 23, 2026
We introduce SeeMPS, a Python library dedicated to implementing tensor network algorithms based on the well-known Matrix Product States (MPS) and Quantized Tensor Train (QTT) formalisms. SeeMPS is implemented as a complete finite precision linear alg...
Dirac-Bergmann algorithm and canonical quantization of $k$-essence cosmology
Andrés Lueiza-Colipí, Andronikos Paliathanasis, Nikolaos Dimakis·Jan 23, 2026
We develop a general canonical quantization scheme for $k$-essence cosmology in scalar-tensor theory. Utilizing the Dirac-Bergmann algorithm, we construct the Hamiltonian associated with the cosmological field equations and identify the first- and se...
Entanglement harvesting in the presence of cavities
Jannik Ströhle, Nikolija Momcilovic·Jan 23, 2026
So far, entanglement harvesting has been extensively studied in free space setups. Here, we provide a detailed analytical and numerical analysis of entanglement harvesting in cavities. Specifically, we adiabatically couple the quantized electromagnet...