Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
QuaRK: A Quantum Reservoir Kernel for Time Series Learning
Abdallah Aaraba, Soumaya Cherkaoui, Ola Ahmad +1 more·Feb 14, 2026
Quantum reservoir computing offers a promising route for time series learning by modelling sequential data via rich quantum dynamics while the only training required happens at the level of a lightweight classical readout. However, studies featuring ...
Quantum Speedups for Group Relaxations of Integer Linear Programs
Brandon Augustino, Dylan Herman, Guneykan Ozgul +5 more·Feb 13, 2026
Integer Linear Programs (ILPs) are a flexible and ubiquitous model for discrete optimization problems. Solving ILPs is \textsf{NP-Hard} yet of great practical importance. Super-quadratic quantum speedups for ILPs have been difficult to obtain because...
Non-Uniform Quantum Fourier Transform
Junaid Aftab, Yuehaw Khoo, Haizhao Yang·Feb 13, 2026
The Discrete Fourier Transform (DFT) is central to the analysis of uniformly sampled signals, yet many practical applications involve non-uniform sampling, requiring the Non-Uniform Discrete Fourier Transform (NUDFT). While quantum algorithms for the...
Hidden Density-Wave Instability in the Trimer Ruthenate Ba4Ru3O10
Gang Cao, Hengdi Zhao, Adrienne Bond +9 more·Feb 13, 2026
We report a hidden density-wave instability in the trimer-based ruthenate Ba4Ru3O10, previously regarded as a pure antiferromagnet with a phase transition at TA=100 K. This transition is manifested in lattice parameters, transport, thermodynamics, an...
Quantum Algorithm Framework for Phase-Contrast Transmission Electron Microscopy Image Simulation
Sean D. Lam, Roberto dos Reis·Feb 13, 2026
We present a quantum algorithmic framework for simulating phase-contrast transmission electron microscopy (CTEM) image formation using a fault-tolerant, gate-based quantum circuit model. The electron wavefield on an $N\times N$ grid is amplitude-enco...
On the Redfield and Lindblad master equations
Hans C. Fogedby·Feb 13, 2026
In a previous work we developed a field theoretical approach to open quantum systems using condensed matter methods. In the Born approximation we derived the Redfield equation on the basis of a multi-oscillator bath, a Dyson equation, a diagrammatic ...
Protection of Exponential Operation using Stabilizer Codes in the Early Fault Tolerance Era
Dawei Zhong, Todd A. Brun·Feb 13, 2026
Quantum error correction offers a promising path to suppress errors in quantum processors, but the resources required to protect logical operations from noise, especially non-Clifford operations, pose a substantial challenge to achieve practical quan...
No-Go Theorem on Fault Tolerant Gadgets for Multiple Logical Qubits
Aranya Chakraborty, Daniel Gottesman·Feb 13, 2026
Identifying stabilizer codes that admit fault-tolerant implementations of the full logical Clifford group would significantly advance fault-tolerant quantum computation. Motivated by this goal, we study several classes of fault-tolerant gadget constr...
Dynamical metastability and transient topological magnons in interacting driven-dissipative magnetic systems
Vincent P. Flynn, Lorenza Viola, Benedetta Flebus·Feb 13, 2026
Metastability, i.e., partial relaxation to long-lived, quasi-stationary states before true asymptotic equilibrium sets in, emerges ubiquitously in classical and quantum dynamical systems as a result of timescales separation. In open quantum systems, ...
Entanglement in quantum spin chains is strictly finite at any temperature
Ainesh Bakshi, Soonwon Choi, Saúl Pilatowsky-Cameo·Feb 13, 2026
Entanglement is the hallmark of quantum physics, yet its characterization in interacting many-body systems at thermal equilibrium remains one of the most important challenges in quantum statistical physics. We prove that the Gibbs state of any quantu...
Matter-induced plaquette terms in a $\mathbb{Z}_2$ lattice gauge theory
Matjaž Kebrič, Fabian Döschl, Umberto Borla +4 more·Feb 13, 2026
Lattice gauge theories (LGTs) provide a powerful framework for studying confinement, topological order, and exotic quantum matter. In particular, the paradigmatic phenomenon of confinement, where dynamical matter is coupled to gauge fields and forms ...
Non-chiral ephemeral edge states and cascading of exceptional points in the non-reciprocal Haldane model
Aditi A. Prabhudesai, H. S. Chhabra, Suraj S. Hegde·Feb 13, 2026
We study a variant of the Haldane honeycomb model that has non-reciprocal hoppings between the next-nearest neighbours. The system on a torus hosts time-reversal symmetry protected exceptional rings(ER) in the spectrum. The ERs act as Berry-curvature...
Mean-Force Hamiltonians from Influence Functionals
Gerard McCaul·Feb 13, 2026
The Hamiltonian of mean force (HMF) provides the standard starting point for strong-coupling thermodynamics, yet explicit operator forms are known only in restricted settings. We present a quenched density framework that uses the Hubbard-Stratonovich...
Single snapshot non-Markovianity of Pauli channels
Alireza Seif, Moein Malekakhlagh, Swarnadeep Majumder +1 more·Feb 13, 2026
Pauli channels are widely used to describe errors in quantum computers, particularly when noise is shaped via Pauli twirling. A common assumption is that such channels admit a Markovian generator, namely a Pauli-Lindblad model with non-negative rates...
Stronger Welch Bounds and Optimal Approximate $k$-Designs
Riccardo Castellano, Dmitry Grinko, Sadra Boreiri +2 more·Feb 13, 2026
A fundamental question asks how uniformly finite sets of pure quantum states can be distributed in a Hilbert space. The Welch bounds address this question, and are saturated by $k$-designs, i.e. sets of states reproducing the $k$-th Haar moments. How...
Theory of Steady States for Lindblad Equations beyond Time-Independence: Classification, Uniqueness and Symmetry
Hironobu Yoshida, Ryusuke Hamazaki·Feb 13, 2026
We present a rigorous and comprehensive classification of the asymptotic behavior of time-quasiperiodic Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) equations under the assumption of Hermitian jump operators. Our main contributions are twofold: first...
A Quantum Reservoir Computing Approach to Quantum Stock Price Forecasting in Quantum-Invested Markets
Wendy Otieno, Alexandre Zagoskin, Alexander G. Balanov +2 more·Feb 13, 2026
We present a quantum reservoir computing (QRC) framework based on a small-scale quantum system comprising at most six interacting qubits, designed for nonlinear financial time-series forecasting. We apply the model to predict future daily closing tra...
Adaptive Pseudoboson Density-Matrix Renormalization Group for Dilute 2D Systems
Fabian J. Pauw, Thomas Köhler, Ulrich Schollwöck +1 more·Feb 13, 2026
Simulating strongly correlated systems in two dimensions is notoriously challenging due to rapid entanglement growth and frustration. Here, we introduce the adaptive projected-purified pseudoboson density-matrix renormalization group (A3P-DMRG) tailo...
Quantitative imaging of Abrikosov vortices by scanning quantum magnetometry
Clemens Schäfermeier, Ankit Sharma, Christopher Kelvin von Grundherr +5 more·Feb 13, 2026
Understanding vortex matter in type-II superconductors is central to controlling dissipation and flux pinning in superconducting materials and devices. Here, we use cryogenic scanning nitrogen vacancy magnetometry (NVM) to image Abrikosov vortices in...
Topology of the Fermi surface and universality of the metal-metal and metal-insulator transitions: $d$-dimensional Hatsugai-Kohmoto model as an example
Gennady Y. Chitov·Feb 13, 2026
The earlier theory [1] of the quantum phase transitions related to the change of the Fermi Surface Topology (FST) is advanced. For such transitions the Fermi surface as a quantum critical manifold determined by the Lee-Yang zeros, the order parameter...