Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Rydberg states with a liquid core
Juan Carlos Acosta Matos, P. Giannakeas, Jan M. Rost·Feb 20, 2026
We develop a self-consistent approach that provides an explicit potential for a Rydberg electron whose ionic core consists of a polarizable medium, typically realized with superfluid droplets. The electron's motion remains separable in spherical coor...
Dispersive Hong-Ou-Mandel Interference with Finite Coincidence Windows
T. J. Walstra, A. J. Hasenack, P. W. H. Pinkse +1 more·Feb 20, 2026
Hong-Ou-Mandel (HOM) interference is a fundamental tool for assessing photon indistinguishability in quantum information processing. While the effect of chromatic dispersion on HOM interference has been widely studied, the interplay between dispersio...
High-quality single photons from cavity-enhanced biexciton-to-exciton transition
Nils Heinisch, Francesco Salusti, Mark R. Hogg +7 more·Feb 20, 2026
Resonant laser excitation of a two-level system with subsequent single-photon emission can be used to generate single photons with high indistinguishability or Hong-Ou-Mandel (HOM) visibility. However, spectral overlap between excitation laser and em...
Clock Synchronization with Weakly Correlated Photons
Justin Yu Xiang Peh, Darren Ming Zhi Koh, Zifang Xu +3 more·Feb 20, 2026
Clock synchronization is necessary for communication and distributed computing tasks. Previous schemes based on photon timing correlations use pulsed light or photon pairs for their strong timing correlations. In this work, we demonstrate successful ...
The hyperfine interaction as a probe of the microscopic structure of the atomic nucleus
Denis Janković, Jean-Gabriel Hartmann, Johann Bartel +3 more·Feb 20, 2026
The study of highly charged electronic and muonic hydrogen-like ions, provides an intriguing way to probe the internal structure of their atomic nuclei. In this work, we use nuclear structure calculations to accurately calculate the hyperfine splitti...
Flux-Activated Resonant Control of a Bosonic Quantum Memory
Fernando Valadares, Aleksandr Dorogov, Tanjung Krisnanda +4 more·Feb 20, 2026
Universal control of bosonic degrees of freedom provides a hardware-efficient route for quantum information processing with high-dimensional systems. Bosonic circuit quantum electrodynamics (cQED), which leverages auxillary transmons to coherently co...
Directional Dynamics of the Non-Hermitian Skin Effect
Bin Yi·Feb 20, 2026
The dynamical consequences of the non-Hermitian skin effect (NHSE) remain largely unexplored despite extensive studies of its static properties. Here we address this gap by applying quantum Liang information flow (QLIF) an inherently directional meas...
Polariton-polariton coherent coupling in a molecular spin-superconductor chip
Carolina del Río, Marcos Rubín-Osanz, David Rodriguez +12 more·Feb 20, 2026
The ability to establish coherent communication channels is key for scaling up quantum devices. Here, we engineer interactions between distant polaritons, hybrid spin-photon excitations formed at different lumped-element superconducting resonators wi...
A contour for the entanglement negativity of bosonic Gaussian states
Gioele Zambotti, Erik Tonni·Feb 20, 2026
We construct a contour function for the logarithmic negativity and the logarithm of the moments of the partial transpose of the reduced density matrix for multimode bosonic Gaussian states of a free lattice model. In one spatial dimension, numerical ...
Pulsed coherent spectroscopy of a quantum emitter in hexagonal Boron Nitride
Jake Horder, Hugo Quard, Kenji Watanabe +3 more·Feb 20, 2026
Defects in solid-state systems constitute a promising platform for the realization of deterministic quantum emitters. Among many candidate materials and emitters, point defects in hexagonal Boron Nitride (hBN) have recently emerged as particularly pr...
Observation of Robust and Coherent Non-Abelian Hadron Dynamics on Noisy Quantum Processors
Fran Ilčić, Ritajit Majumdar, Emil Mathew +3 more·Feb 20, 2026
The real-time evolution of strongly interacting matter remains a frontier of fundamental physics, as classical simulations are hampered by exponential Hilbert space growth and rapid, unmanageable growth of quantum entanglement. This study reports the...
Gaussian Dynamical Quantum State Tomography
Hjalmar Rall·Feb 20, 2026
Standard quantum state tomography assumes sufficient control of a system to measure an informationally complete set of observables. Dynamical quantum state tomography (DQST) presents an alternative: given a system with known dynamics and a single fix...
Separating Non-Interactive Classical Verification of Quantum Computation from Falsifiable Assumptions
Mohammed Barhoush, Tomoyuki Morimae, Ryo Nishimaki +1 more·Feb 20, 2026
Mahadev [SIAM J. Comput. 2022] introduced the first protocol for classical verification of quantum computation based on the Learning-with-Errors (LWE) assumption, achieving a 4-message interactive scheme. This breakthrough naturally raised the questi...
A Tailored Fidelity Estimation and Purification Method for Entangled Quantum Networks
Takafumi Oka, Michal Hajdušek, Shota Nagayama +1 more·Feb 20, 2026
We present a method to conduct both quantum state reconstruction and entanglement purification simultaneously that is advantageous in several respects over previous work in this direction, showing that the number of Bell pairs necessary to boot a qua...
Enhanced Maximum Independent Set Preparation with Rydberg Atoms Guided by the Spectral Gap
Seokho Jeong, Minhyuk Kim·Feb 20, 2026
Adiabatic quantum computation with Rydberg atoms provides a natural route for solving combinatorial optimization problems such as the maximum independent set (MIS). However, its performance is fundamentally limited by the reduction of the spectral ga...
Recursive Sketched Interpolation: Efficient Hadamard Products of Tensor Trains
Zhaonan Meng, Yuehaw Khoo, Jiajia Li +1 more·Feb 20, 2026
The Hadamard product of two tensors in the tensor-train (TT) format is a fundamental operation across various applications, such as TT-based function multiplication for nonlinear differential equations or convolutions. However, conventional methods f...
Distributed Hyperbolic Floquet Codes under Depolarizing and Erasure Noise
Aygul Azatovna Galimova·Feb 20, 2026
Distributing qubits across quantum processing units (QPUs) connected by shared entanglement enables scaling beyond monolithic architectures. Hyperbolic Floquet codes use only weight-2 measurements and are good candidates for distributed quantum error...
Simulating Quantum Field Theories with Boundaries in Curved Spacetimes Using Open Spin Systems
Shunichiro Kinoshita, Keiju Murata, Daisuke Yamamoto +1 more·Feb 20, 2026
We develop a framework to simulate quantum field theories (QFTs) with boundaries in $(1+1)$-dimenmsional curved spacetimes by employing open spin systems. Building upon our previous work that established a mapping from spin systems to QFTs in periodi...
Comparison of security mechanisms of Mathematical cipher, Wyner scheme, QKD, and Quantum stream cipher
Gikyu Yamamoto, Osamu Hirota·Feb 20, 2026
A new generation of global communications technology has been emerging. These systems, which utilize established device technologies and quantum effect devices, require ultra-high speeds, low cost, and strong security. In recent years, global communi...
Time uncertainty and fundamental sensitivity limits in quantum sensing: application to optomechanical gravimetry
Salman Sajad Wani, Saif Al-Kuwari, Arshid Shabir +3 more·Feb 20, 2026
High-sensitivity accelerometers and gravimeters, achieving the ultimate limits of measurement sensitivity are key tools for advancing both fundamental and applied physics. While numerous platforms have been proposed to achieve this goal, from atom in...