Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Efficient time-series prediction on NISQ devices via time-delayed quantum extreme learning machine
Mio Kawanabe, Saud Cindrak, Kathy Luedge +3 more·Feb 25, 2026
We proposed a time-delayed quantum extreme learning machine (TD-QELM) for efficient time-series prediction on noisy intermediate-scale quantum (NISQ) devices. By encoding multiple past inputs simultaneously, TD-QELM achieves shallow circuit depth ind...
Momentum Diffusion, Decoherence and Drag Force on a Magnetic Nanoparticle
Agya Sewara Alam, Anupam Mazumdar·Feb 25, 2026
In this paper, we will provide a complete derivation of the decoherence rate for a magnetic nanoparticle in quantum superposition in the presence of the fluctuating electromagnetic field in a thermal background by using the fluctuation-dissipation th...
Optimized ancillary drive for fast Rydberg entangling gates
Rui Li, Min-Hua Zhang, Jing Qian·Feb 25, 2026
Reaching fast and robust two-qubit gates with low infidelities has been an outstanding challenge for the long-term goal of useful quantum computers. Typically, optimizing the pulse shapes can minimize the gate infidelity and improve its robustness to...
Universal Sample Complexity Bounds in Quantum Learning Theory via Fisher Information Matrix
Hyukgun Kwon, Seok Hyung Lie, Liang Jiang·Feb 25, 2026
In this work, we show that the sample complexity required in quantum learning theory within a general parametric framework, is fundamentally governed by the inverse Fisher information matrix. More specifically, we derive upper and lower bounds on the...
Coupling nitrogen vacancy centers in silicon carbide to nanophotonic resonators
Ivan Zhigulin, Konosuke Shimazaki, Samuel M. Stephens +5 more·Feb 25, 2026
Silicon carbide (SiC) is a promising platform for scalable quantum technologies owing to its well-established, wafer-scale industrial processing. SiC also hosts a variety of optically active color centres including the nitrogen vacancy defect that ha...
Passive Synchronization of Nonlocal Franson Interferometry for Fiber-Based Quantum Networks Using Co-propagating Classical Clock Signals
Xiao Xiang, Runai Quan, Yuting Liu +7 more·Feb 25, 2026
We demonstrate a robust, high-visibility nonlocal Franson interferometry for fiber-based quantum networks by co-propagating a classical Radio-over-Fiber clock signal with energy-time entangled photon pairs in the same fiber. Utilizing cross-band allo...
Nonlinearity-Inhomogeneity Competition in Discrete-Time Quantum Walks
N. Amaral, A. R. C. Buarque, W. S. Dias·Feb 25, 2026
We investigate the interplay between nonlinearity and inhomogeneities in discrete-time quantum walks on one-dimensional lattices. Nonlinear effects are introduced through a Kerr-like, intensity-dependent local phase, while spatial and temporal inhomo...
On fully entangled fraction of arbitrary $d\otimes d$ quantum states
Xue-Na Zhu, Gui Bao, Ming Li +2 more·Feb 25, 2026
We study the fully entangled fraction of quantum states based on the Bloch representation of density matrices. Analytical upper bounds on the fully entangled fraction are obtained for arbitrary $d\otimes d$ bipartite systems. The fully entangled frac...
Unsupervised Discovery of Intermediate Phase Order in the Frustrated $J_1$-$J_2$ Heisenberg Model via Prometheus Framework
Brandon Yee, Wilson Collins, Maximilian Rutkowski·Feb 25, 2026
The spin-$1/2$ $J_1$-$J_2$ Heisenberg model on the square lattice exhibits a debated intermediate phase between Néel antiferromagnetic and stripe ordered regimes, with competing theories proposing plaquette valence bond, nematic, and quantum spin liq...
Topological phase dynamics described by overtone-synthesized classical and quantum Adler equations
Hiroshi Yamaguchi, Motoki Asano·Feb 25, 2026
The Adler equation is a well-known one-dimensional model describing phase locking and synchronization. Motivated by recent experiments using optomechanical oscillators, we extend the model to include overtone-synthesized sinusoidal coupling with adia...
Quantum Attacks Targeting Nuclear Power Plants: Threat Analysis, Defense and Mitigation Strategies
Yaser Baseri, Edward Waller·Feb 25, 2026
The advent of Cryptographically Relevant Quantum Computers (CRQCs) presents a fundamental and existential threat to the forensic integrity and operational safety of Industrial Control Systems (ICS) and Operational Technology (OT) in critical infrastr...
CQSA: Byzantine-robust Clustered Quantum Secure Aggregation in Federated Learning
Arnab Nath, Harsh Kasyap·Feb 25, 2026
Federated Learning (FL) enables collaborative model training without sharing raw data. However, shared local model updates remain vulnerable to inference and poisoning attacks. Secure aggregation schemes have been proposed to mitigate these attacks. ...
Deep Sequence Modeling with Quantum Dynamics: Language as a Wave Function
Ahmed Nebli, Hadi Saadatdoorabi, Kevin Yam·Feb 24, 2026
We introduce a sequence modeling framework in which the latent state is a complex-valued wave function evolving on a finite-dimensional Hilbert space under a learned, time-dependent Hamiltonian. Unlike standard recurrent architectures that rely on ga...
Efimov Effect in Ultracold Microwave-Shielded Polar Molecules
Shayamal Singh, Chris H. Greene·Feb 24, 2026
A quantum-mechanical description is presented for the three-body physics of shielded dipolar molecules, including a prediction of observable Efimov physics. Despite the anisotropic and long-range nature of the interaction, shielding enables a regime ...
Markovian Embeddings of Non-Markovian Open System Dynamics
Meng Xu, J. T. Stockburger, J. Ankerhold·Feb 24, 2026
Embedding non-Markovian open quantum dynamics into an enlarged Markovian space offers a powerful route to nonperturbative simulations, where the dynamics of the extended space can be governed by multiple distinct Markovian equations. We show that the...
Klein--Gordon oscillator with linear--fractional deformed Casimirs in doubly special relativity
Abdelmalek Boumali, Nosratollah Jafari·Feb 24, 2026
We study the Klein--Gordon (KG) oscillator in a doubly special relativity (DSR) framework, where the mass-shell condition is deformed through a linear--fractional (Möbius-type) modification of the Casimir invariant. This is induced by a nonlinear map...
Phonon decoherence produced by two-level tunneling states
Ryan O. Behunin, Taylor Ray, Dylan Chapman +3 more·Feb 24, 2026
Phonon modes within pristine crystalline resonators now routinely reach the quantum ground state. Such systems are attractive for quantum information science applications, as advanced fabrication and processing can enable relatively long quantum cohe...
Natural Qubit Algebra: clarification of the Clifford boundary and new non-embeddability theorem
Grigory Koroteev·Feb 24, 2026
We introduce Natural Qubit Algebra (NQA), a compact real operator calculus for qubit systems based on a $2\times2$ block alphabet $\{I,X,Z,W\}\subset\mathrm{Mat}(2,\mathbb{R})$ and tensor-word representations. The resulting multiplication law induces...
Identifying quantum coherence in quantum annealers
Connor Aronoff, Travis Howard, David Nicholaeff +2 more·Feb 24, 2026
Demonstrating genuine many-body quantum coherence in large-scale quantum processors remains a central challenge for near-term quantum technologies. Recent experiments on D-Wave quantum annealers have investigated quenches of Ising chains and observed...
The Inverse Born Rule Fallacy: On the Informational Limits of Phase-Locked Amplitude Encoding
Sebastian Zając, Jacob L. Cybulski, Bartosz Dziewit +1 more·Feb 24, 2026
In Quantum Machine Learning (QML) and Quantum Finance, amplitude encoding is often motivated by its logarithmic storage capacity arXiv:1307.0411. This paradigm typically relies on the mapping $ψ= \sqrt{P}$, treating the quantum state as a derivative ...