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Live trends in quantum computing research, updated daily from arXiv.
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Fast Transport of Trapped Ultracold Atoms Using Shortcuts-to-Adiabaticity by Counterdiabatic Driving
Denuwan Vithanage, Skyler Wright, Edith Luveina-Joseph +2 more·Nov 6, 2025
We numerically study the fast spatial transport of a trapped Bose-Einstein condensate (BEC) using shortcuts-to-adiabaticity (STA) by counterdiabatic driving (CD). The trapping potential and the required auxiliary potential were simulated as painted p...
Anomalous heat flow and quantum Otto cycle with indefinite causal order
Qing-Feng Xue, Qi Zhang, Xu-Cai Zhuang +5 more·Nov 6, 2025
The principle that heat spontaneously flows from higher temperature to lower temperature is a cornerstone of classical thermodynamics, often assumed to be independent of the sequence of interactions. While this holds true for macroscopic systems at e...
Quantum error correction for multiparameter metrology
Mauricio Gutiérrez, Chiranjib Mukhopadhyay, Victor Montenegro +1 more·Nov 6, 2025
For single-parameter sensing, Greenberger-Horne-Zeilinger (GHZ) probes achieve optimal quantum-enhanced precision across the unknown parameter range, solely relying on parameter-independent separable measurement strategies for all values of the unkno...
Legal Entanglement
Nicholas Godfrey, Ted Sichelman·Nov 6, 2025
Quantum entanglement is a phenomenon in which two physical systems are correlated in such a way that they appear to instantaneously affect one another, regardless of the distance between them. As commonly understood, Bell's Theorem famously demonstra...
Multi-Directional Periodic Driving of a Two-Level System beyond Floquet Formalism
Michael Warnock, David A. Hague, Vesna F. Mitrovic·Nov 6, 2025
In this manuscript, we introduce an exact expression for the response of a semi-classical two-level quantum system subject to arbitrary periodic driving. Determining the transition probabilities of a two-level system driven by an arbitrary periodic w...
Non-invertible Kramers-Wannier duality-symmetry in the trotterized critical Ising chain
Akash Sinha, Pramod Padmanabhan, Vladimir Korepin·Nov 6, 2025
Integrable trotterization provides a method to evolve a continuous time integrable many-body system in discrete time, such that it retains its conserved quantities. Here we explicitly show that the first order trotterization of the critical transvers...
Quantum Optical Techniques for Biomedical Imaging
Vahid Salari, Yingwen Zhang, Sepideh Ahmadi +7 more·Nov 6, 2025
Quantum imaging is emerging as a transformative approach for biomedical applications, applying nonclassical properties of light, such as entanglement, squeezing, and quantum correlations, to overcome fundamental limits of conventional techniques. The...
Novel Encodings of Homology, Cohomology, and Characteristic Classes
Itai Maimon·Nov 5, 2025
Topological quantum error-correcting codes (QECC) encode a variety of topological invariants in their code space. A classic structure that has not been encoded directly is that of obstruction classes of a fiber bundle, such as the Chern or Euler clas...
Controlled growth of rare-earth-doped TiO$_{2}$ thin films on III-V semiconductors for hybrid quantum photonic interfaces
Henry C. Hammer, Caleb Whittier, Nathan A. Helvy +3 more·Nov 5, 2025
Quantum photonic networks require two distinct functionalities: bright single-photon sources and long-lived quantum memories. III-V semiconductor quantum dots excel as deterministic and coherent photon emitters, while rare-earth ions such as erbium (...
Realistic Gottesman-Kitaev-Preskill stabilizer states enable universal quantum computation
Fariba Hosseinynejad, Pavithran Iyer, Guillaume Dauphinais +1 more·Nov 5, 2025
Physical Gottesman-Kitaev-Preskill (GKP) states are inherently noisy as ideal ones would require infinite energy. While this is typically considered as a deficiency to be actively corrected, this work demonstrates that imperfect GKP stabilizer states...
On universality of hardware-efficient ansatzes
Hokuto Iwakiri, Keita Kanno·Nov 5, 2025
The hardware-efficient ansatz (HEA) is one of the most important class of parametrized quantum circuits for near-term applications of quantum computing. We show that the problem of simulating some major classes of the HEA is BQP-complete by explicitl...
Temporal entanglement transition in chaotic quantum many-body dynamics
Ilya Vilkoviskiy, Michael Sonner, Qi Camm Huang +3 more·Nov 5, 2025
Temporal entanglement (TE) of an influence matrix (IM) has been proposed as a measure of complexity of simulating dynamics of local observables in a many-body system. Foligno et al. [Phys. Rev. X 13, 041008 (2023)] recently argued that the TE in chao...
The Geometric Origin of Time's Arrow: Loschmidt Resolved
Ira Wolfson·Nov 5, 2025
We resolve Loschmidt's paradox-the 150-year-old contradiction between time-reversible microscopic dynamics and irreversible macroscopic evolution. The resolution requires both quantum mechanics and classical chaos; neither alone suffices. Quantum unc...
Quadrature-witness readout for backscatter mitigation in gravitational-wave detectors limited by back-action
Niels Böttner, Roman Schnabel, Mikhail Korobko·Nov 5, 2025
Disturbances in gravitational wave (GW) observational data are often caused by non-stationary noise in the detector itself, such as back-scattering of laser stray light into the signal field. Unlike GW signals, non-stationary noise can appear in both...
Boltzmann Sampling of Frustrated J1 - J2 Ising Models with Programmable Quantum Annealers
Elijah Pelofske·Nov 5, 2025
One of the surprising, and potentially very useful, capabilities of analog quantum computers, such as D-Wave quantum annealers, is sampling from the Boltzmann, or Gibbs, distribution defined by a classical Hamiltonian. In this study, we thoroughly ex...
Holographic Black Hole Formation and Scrambling in Time-Ordered Correlators
Pratyusha Chowdhury, Felix M. Haehl, Adrián Sánchez-Garrido +1 more·Nov 5, 2025
We describe a holographic mechanism for black hole formation via the collision of two shock waves in three-dimensional anti-de Sitter spacetime. In the dual conformal field theory (CFT), a two-shock-wave state corresponds to the insertion of two boos...
Krylov Complexity Meets Confinement
Xuhao Jiang, Jad C. Halimeh, N. S. Srivatsa·Nov 5, 2025
In high-energy physics, confinement denotes the tendency of fundamental particles to remain bound together, preventing their observation as free, isolated entities. Interestingly, analogous confinement behavior emerges in certain condensed matter sys...
Cosmological Entanglement Entropy from the von Neumann Algebra of Double-Scaled SYK & Its Connection with Krylov Complexity
Sergio E. Aguilar-Gutierrez·Nov 5, 2025
We investigate entanglement entropy between the pair of type II$_1$ algebras of the double-scaled SYK (DSSYK) model given a chord state, its holographic interpretation as generalized horizon entropy; particularly in the (anti-)de Sitter ((A)dS) space...
Variations on a Theme of Krylov
Vijay Balasubramanian, Pawel Caputa, Joan Simón·Nov 5, 2025
Spread complexity uses the distribution of support of a time-evolving state in the Krylov basis to quantify dispersal across accessible dimensions of a Hilbert space. Here, we describe how variations in initial conditions, the Hamiltonian, and the di...
A Transferable Machine Learning Approach to Predict Quantum Circuit Parameters for Electronic Structure Problems
Davide Bincoletto, Korbinian Stein, Jonas Motyl +1 more·Nov 5, 2025
The individual optimization of quantum circuit parameters is currently one of the main practical bottlenecks in variational quantum eigensolvers for electronic systems. To this end, several machine learning approaches have been proposed to mitigate t...