Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Selective high-order topological states and tunable chiral emission in atomic metasurfaces
Yi-Xin Wang, Yan Zhang, Lei Du +2 more·Oct 9, 2025
Atomic metasurfaces (AMs) provide a powerful nanophotonic platform for integrating topological effects into quantum many-body systems. In this Letter, we investigate the quantum optical and topological properties of a two-dimensional Kagome AM, going...
Transversal gates for probabilistic implementation of multi-qubit Pauli rotations
Nobuyuki Yoshioka, Alireza Seif, Andrew Cross +1 more·Oct 9, 2025
We introduce a general framework for weak transversal gates -- probabilistic implementation of logical unitaries realized by local physical unitaries -- and propose a novel partially fault-tolerant quantum computing architecture that surpasses the st...
Operational protocols cannot certify classicality
Chris Fields, James F. Glazebrook, Antonino Marcianò +1 more·Oct 9, 2025
The existence and practical utility of operational protocols that certify entanglement raises the question of whether operational protocols exist that certify the absence of entanglement, i.e. that certify separability. We show, within a purely topol...
Generalised fractional Rabi problem
Alexander Lopez, Sébastien Fumeron, Malte Henkel +2 more·Oct 9, 2025
Fractional quantum dynamics provides a natural framework to capture nonlocal temporal behavior and memory effects in quantum systems. In this work, we analyze the physical consequences of fractional-order quantum evolution using a Green's function fo...
Local active error correction from simulated confinement
Ethan Lake·Oct 9, 2025
We refine an old idea for performing fault-tolerant error correction in topological codes by simulating confining interactions between excitations. We implement confinement using an array of local classical processors that measure syndromes, broadcas...
Chiral Edge Excitations of Fractional Chern Insulators
Xiao-Han Yang, Ji-Yao Chen, Xiao-Yu Dong·Oct 9, 2025
Edge excitations are the defining signature of chiral topologically ordered systems. In continuum fractional quantum Hall (FQH) states, these excitations are described by the chiral Luttinger liquid ($χ$LL) theory. Whether this effective description ...
Reconfigurable dissipative entanglement between many spin ensembles: from robust quantum sensing to many-body state engineering
Anjun Chu, Mikhail Mamaev, Martin Koppenhöfer +2 more·Oct 8, 2025
An attractive approach for stabilizing entangled many-body spin states is to employ engineered dissipation. Most existing proposals either target relatively simple collective spin states, or require numerous independent and complex dissipative proces...
Quantum Filtering and Analysis of Multiplicities in Eigenvalue Spectra
Zhiyan Ding, Lin Lin, Yilun Yang +1 more·Oct 8, 2025
Fine-grained spectral properties of quantum Hamiltonians, including both eigenvalues and their multiplicities, provide useful information for characterizing many-body quantum systems as well as for understanding phenomena such as topological order. E...
Pareto-optimality of Majoranas in hybrid platforms
Juan Daniel, Torres Luna, Sebastian Miles +5 more·Oct 8, 2025
To observe Majorana bound states, and especially to use them as a qubit, requires careful optimization of competing quality metrics. We systematically compare Majorana quality in proximitized semiconductor nanowires and quantum dot chains. Using mult...
Simulating topological order on quantum processors
A. Gammon-Smith, M. Knap, F. Pollmann·Oct 8, 2025
It is an ongoing quest to realize topologically ordered quantum states on different platforms including condensed matter systems, quantum simulators and digital quantum processors. Unlike conventional states characterized by their local order, these ...
Beyond the non-Hermitian skin effect: scaling-controlled topology from Exceptional-Bound Bands
Mengjie Yang, Ching Hua Lee·Oct 7, 2025
We establish a novel mechanism for topological transitions in non-Hermitian systems that are controlled by the system size. Based on a new paradigm known as exceptional-bound (EB) band engineering, its mechanism hinges on the unique critical scaling ...
Identifying chiral topological order in microscopic spin models by modular commutator
Avijit Maity, Aman Kumar, Vikram Tripathi·Oct 7, 2025
The chiral central charge $c_-$ is a key topological invariant of the edge characterizing the bulk two-dimensional chiral topological order, but its direct evaluation in microscopic spin models has long been a challenge, especially for non-abelian to...
Angular--Momentum--Resolved Aharonov--Bohm Coupling Energy
Ju Gao, Fang Shen·Oct 7, 2025
We present an angular--momentum--resolved energetic formulation of the Aharonov--Bohm (AB) response for a confined Dirac electron based on two gauge--invariant interaction functionals: a magnetization--field functional and a current--potential functi...
Valley-dependent topological interface states in biased armchair nanoribbons of gapless single-layer graphene for transport applications
Zheng-Han Huang, Jing-Yuan Lai, Yu-Shu G. Wu·Oct 7, 2025
Valley-dependent topological physics offers a promising avenue for designing nanoscale devices based on gapless single-layer graphene. To demonstrate this potential, we investigate an electrical bias-controlled topological discontinuity in valley pol...
Dynamical quantum codes and logic gates on a lattice with sparse connectivity
Dominic J. Williamson, Bence Hetényi·Oct 6, 2025
We introduce several dynamical schemes that take advantage of mid-circuit measurement and nearest-neighbor gates on a lattice with maximum vertex degree three to implement topological codes and perform logic gates between them. We first review exampl...
Scalable accuracy gains from postselection in quantum error correcting codes
Hongkun Chen, Daohong Xu, Grace M. Sommers +3 more·Oct 6, 2025
Decoding stabilizer codes such as the surface and toric codes involves evaluating free-energy differences in a disordered statistical mechanics model, in which the randomness comes from the observed pattern of error syndromes. We study the statistica...
Fast surgery for quantum LDPC codes
Nouédyn Baspin, Lucas Berent, Lawrence Z. Cohen·Oct 6, 2025
Quantum LDPC codes promise significant reductions in physical qubit overhead compared with topological codes. However, many existing constructions for performing logical operations come with distance-dependent temporal overheads. We introduce a schem...
Higher-form entanglement asymmetry and topological order
Amanda Gatto Lamas, Jacopo Gliozzi, Taylor L. Hughes·Oct 4, 2025
We extend a recently defined measure of symmetry breaking, the entanglement asymmetry, to higher-form symmetries. In particular, we focus on Abelian topological order in two dimensions, which spontaneously breaks a 1-form symmetry. Using the toric co...
Utility-Scale Quantum State Preparation: Classical Training using Pauli Path Simulation
Cheng-Ju Lin, Hrant Gharibyan, Vincent P. Su·Oct 2, 2025
We use Pauli Path simulation to variationally obtain parametrized circuits for preparing ground states of various quantum many-body Hamiltonians. These include the quantum Ising model in one dimension, in two dimensions on square and heavy-hex lattic...
Topological Hall effect in nonlinear optics
Soumik Nandi, Arannya Ghosh, Ashok K Mohapatra +1 more·Oct 2, 2025
We present an experimental evidence of \emph{topological} Hall-effect in an all-optical third-order nonlinear optical process via spatial symmetry-breaking in pseudo-spin textures created by a spatially-structured pump laser beam. The experimental co...