Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,003 papers in 12 months (-3% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A Tunable, Modeless, and Hybridization-free Cross-Kerr Coupler for Miniaturized Superconducting Qubits
Gihwan Kim, Andreas Butler, Oskar Painter·Feb 3, 2026
Superconducting quantum circuits typically use capacitive charge-based linear coupling schemes to control interactions between elements such as qubits. While simple and effective, this coupling scheme makes it difficult to satisfy competing circuit d...
Surpassing the currently achievable distance of quantum key distribution based on sending-or-not-sending approach
Georgi Bebrov·Feb 3, 2026
Protocols based on the sending-or-not-sending (SNS) principle have been intensively studied in recent years and have been shown to enable the longest transmission distances in quantum key distribution (QKD). In this work, we propose a sending-or-not-...
Validating a Koopman-Quantum Hybrid Paradigm for Diagnostic Denoising of Fusion Devices
Tie-Jun Wang, Run-Qing Zhang, Ling Qian +4 more·Feb 3, 2026
The potential of Quantum Machine Learning (QML) in data-intensive science is strictly bottlenecked the difficulty of interfacing high-dimensional, chaotic classical data into resource-limited, noisy quantum processors. To bridge this gap, we introduc...
Quantum Annealing for Combinatorial Optimization: Foundations, Architectures, Benchmarks, and Emerging Directions
Rudraksh Sharma, Ravi Katukam, Arjun Nagulapally·Feb 3, 2026
Critical decision-making issues in science, engineering, and industry are based on combinatorial optimization; however, its application is inherently limited by the NP-hard nature of the problem. A specialized paradigm of analogue quantum computing, ...
Resource-efficient quantum simulation of transport phenomena via Hamiltonian embedding
Joseph Li, Gengzhi Yang, Jiaqi Leng +1 more·Feb 3, 2026
Transport phenomena play a key role in a variety of application domains, and efficient simulation of these dynamics remains an outstanding challenge. While quantum computers offer potential for significant speedups, existing algorithms either lack ri...
Quantum spin-heat engine with trapped ions
André R. R. Carvalho, Liam J. McClelland, Erik W. Streed +1 more·Feb 3, 2026
We propose an ion-trap implementation of the Vaccaro, Barnett and Wright et al. spin-heat engine (SHE); a hypothetical engine that operates between energy and spin thermal reservoirs rather than two energy reservoirs. The SHE operates in two steps: f...
Device variability of Josephson junctions induced by interface roughness
Yu Zhu, Félix Beaudoin, Hong Guo·Feb 3, 2026
As quantum processors scale to large qubit numbers, device-to-device variability emerges as a critical challenge. Superconducting qubits are commonly realized using Al/AlO$_{\text{x}}$/Al Josephson junctions operating in the tunneling regime, where e...
Physics-inspired transformer quantum states via latent imaginary-time evolution
Kimihiro Yamazaki, Itsushi Sakata, Takuya Konishi +1 more·Feb 3, 2026
Neural quantum states (NQS) are powerful ansätze in the variational Monte Carlo framework, yet their architectures are often treated as black boxes. We propose a physically transparent framework in which NQS are treated as neural approximations to la...
Accelerating the Tesseract Decoder for Quantum Error Correction
Dragana Grbic, Laleh Aghababaie Beni, Noah Shutty·Feb 3, 2026
Quantum Error Correction (QEC) is essential for building robust, fault-tolerant quantum computers; however, the decoding process often presents a significant computational bottleneck. Tesseract is a novel Most-Likely-Error (MLE) decoder for QEC that ...
Asymptotically Optimal Quantum Universal Quickest Change Detection
Arick Grootveld, Haodong Yang, Nandan Sriranga +3 more·Feb 3, 2026
This paper investigates the quickest change detection of quantum states in a universal setting: specifically, where the post-change quantum state is not known a priori. We establish the asymptotic optimality of a two-stage approach in terms of worst ...
Efficient Three-Dimensional Sub-Doppler Cooling of $^{40}$Ca$^+$ in a Penning Trap
Brian J. McMahon, Brian C. Sawyer·Feb 3, 2026
We demonstrate efficient sub-Doppler laser cooling of the three eigenmodes of a $^{40}$Ca$^+$ ion confined in a compact Penning trap operating with a magnetic field of 0.91 T. Using the same set of laser beams as required for the initial Doppler lase...
Investigating Quantum Circuit Designs Using Neuro-Evolution
Devroop Kar, Daniel Krutz, Travis J. Desell·Feb 3, 2026
Designing effective quantum circuits remains a central challenge in quantum computing, as circuit structure strongly influences expressivity, trainability, and hardware feasibility. Current approaches, whether using manually designed circuit template...
Multi-Player, Multi-Strategy Quantum Game Model for Interaction-Aware Decision-Making in Automated Driving
Karim Essalmi, Fernando Garrido, F. Nashashibi·Feb 3, 2026
Although significant progress has been made in decision-making for automated driving, challenges remain for deployment in the real world. One challenge lies in addressing interaction-awareness. Most existing approaches oversimplify interactions betwe...
Quantum phase transition in transverse-field Ising model on Sierpiński gasket lattice
Tymoteusz Braciszewski, Oliwier Urbański, Piotr Tomczak·Feb 2, 2026
We investigate the quantum phase transition in the transverse-field Ising model on the Sierpiński gasket using finite-size scaling (FSS) and numerical renormalization group (NRG). Since next generations of the fractal lattice contain exponentially mo...
Quantum Information Flow in Microtubule Tryptophan Networks
Lea Gassab, Onur Pusuluk, Travis J. A. Craddock·Feb 2, 2026
Networks of aromatic amino acid residues within microtubules, particularly those formed by tryptophan, may serve as pathways for optical information flow. Ultraviolet excitation dynamics in these networks are typically modeled with effective non-Herm...
Wave packet description of Majorana neutrino oscillations in a magnetic field
Artem Popov, Alexander Studenikin, Alexander Tcvirov·Feb 2, 2026
Majorana neutrino oscillations in a magnetic field are considered using the wave packets formalism. The modified Dirac equation for Majorana neutrinos with non-zero transition magnetic moments propagating in a magnetic field is solved analytically in...
Experimental Quantification of Spin-Phonon Coupling in Molecular Qubits using Inelastic Neutron Scattering
Stefan H. Lohaus, Kay T. Xia, Yongqiang Cheng +1 more·Feb 2, 2026
Electronic spin superposition states enable nanoscale sensing through their sensitivity to the local environment, yet their sensitivity to vibrational motion also limits their coherence times. In molecular spin systems, chemical tunability and atomic...
Inducing, and enhancing, many-body quantum chaos by continuous monitoring
Xianlong Liu, Jie-ping Zheng, Antonio M. García-García·Feb 2, 2026
It is intuitively expected, and supported by earlier studies, that many-body quantum chaos is suppressed, or even destroyed, by dissipative effects induced by continuous monitoring. We show here that this is not always the case. For this purpose, we ...
Dynamic Simulations of Strongly Coupled Spin Ensembles for Inferring Nature of Electronic Correlations from Nuclear Magnetic Resonance
Charles Snider, Stephen Carr, D. E. Feldman +2 more·Feb 2, 2026
We develop an efficient package for the simulation of nuclear magnetic resonance spin echo experiments to study the effects of strong electronic spin correlations on the dynamics of the nuclear spin ensemble. A mean-field model is used to study corre...
Quantum Tomography of Fermion Pairs in $e^+e^-$ Collisions: Longitudinal Beam Polarization Effects
Yu-Chen Guo, Tao Han, Matthew Low +1 more·Feb 2, 2026
We present a quantum tomography study of fermion pair production at future $e^+e^-$ colliders, emphasizing how longitudinal beam polarization controls the two-qubit spin density matrix. We study the processes $e^+ e^- \to t\bar{t},\ e^+e^-\to μ^+μ^-$...