Papers
Live trends in quantum computing research, updated daily from arXiv.
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Hardware platform mentions in abstracts — Photonic leads
Quantifying Entangling Power of Controlled Unitary Gates
Ankur Haldar, Pankaj Agrawal, Prasenjit Deb·Aug 21, 2026
Applying controlled unitary gates to generate entanglement between qubits is a routine task in both quantum communication and computation. The existing tools for predicting how much entanglement a given gate can generate require either simulation of ...
Symmetry Constrained Quantum Error Mitigation for the Schwinger Model
Alexander Tomlinson, Graham Van Goffrier, Bipasha Chakraborty +1 more·Aug 21, 2026
Quantum error mitigation (QEM) is at the very heart of near-term quantum simulations and lattice gauge theories are no exceptions, rather their physical symmetries provide natural consistency checks on noise quantum states. In this work, we exploit t...
Minimization of micromotion for nanoparticles in a Paul trap
Jamie Morley, Jean Paul Louys Sansó, Dmitry Bykov +2 more·Aug 21, 2026
When a charged particle in a Paul trap is displaced from the node of the AC trapping field, excess micromotion arises as an undesired effect. Excess micromotion heats the particle, limits the precision with which the particle can be localised, and ac...
Degeneracy beyond the parity-symmetry protection in the Lipkin-Meshkov-Glick model
Jamil Khalouf-Rivera, Miguel Carvajal, Francisco Pérez-Bernal·Aug 21, 2026
Degeneracy patterns in quantum mechanics stem from the system symmetries. In particular, the broken-symmetry phase in the well-known Lipkin-Meshkov-Glick (LMG) model is composed of doubly-degenerate states of different parity. In this work, we show t...
When More Becomes Less: Topology-Reversed Three-Qubit Gate Performance on IBM Quantum Processors
Simona K. Grigorova, Stancho S. Stanchev, Nikolay V. Vitanov·Aug 21, 2026
The exact Toffoli gate admits a six-CX decomposition, denoted by $CCX_6$, that is optimal under unrestricted two-qubit connectivity. On a linear three-qubit topology, however, $CCX_6$ contains 4 nearest-neighbor CX gates and 2 non-nearest-neighbor CX...
A Classification of Translation-Invariant Quantum Codes in Any Dimension
Andrew Li, Dominic J. Williamson·Aug 21, 2026
Quantum error-correcting codes with two-dimensional translation invariance are known to be equivalent to copies of the two-dimensional toric code. Such a simple classification is not possible for quantum codes with higher dimensional translation inva...
Tools for Reducing Service Time in Near-Term Quantum Networks
Jake Smith, Thomas R. Beauchamp, Scarlett Gauthier +2 more·Aug 21, 2026
Architectures have been proposed to control entanglement generation in multi-user quantum networks. To allow time for local operations and classical communication at end nodes, these architectures insert fixed separations between consecutive batches ...
Finite Weyl polynomials and the approach to Tsirelson's bound in relativistic scalar quantum field theory
J. G. A. Caribé, M. S. Guimaraes, I. Roditi +1 more·Aug 21, 2026
We construct four bounded Hermitian operators, each one a finite polynomial in the unitary Weyl operators, for the Bell-CHSH inequality in a free massive scalar field in $1+1$ dimensions. The operators are localized in complementary wedges. Odd Weyl ...
Anisotropic dynamical reconstruction of quantum geometry in quenched Chern insulators
Nan Li, Zhiyong Liu, Zhaoxin Liang +1 more·Aug 21, 2026
Under unitary dynamics, the Chern number of an evolving quantum state remains conserved even when a quench drives the Hamiltonian across a topological phase transition. In sharp contrast, we reveal an anisotropic dynamical reconstruction of the quant...
Characterizing Multimode Effects in a Guided Matterwave Gyroscope
Jessica K. Eastman, Ellen Zheng, Stuart S. Szigeti +1 more·Aug 21, 2026
We theoretically investigate the performance of a compact matterwave vortex gyroscope formed by a two-component Bose-Einstein condensate in a toroidal potential. Unlike conventional atomic gyroscopes that rely on the Sagnac effect, the topological st...
Dissipation driven boundary localization in higher order topological insulators
Xue Ping Ren, Xiao Ran Wang, Xin Ran Ma +2 more·Aug 21, 2026
We study dissipation driven boundary localization in a Bernevig Hughes Zhang type second order topological insulator by introducing inhomogeneous, spin dependent boundary dissipation. After projection onto the edge subspace, the dominant component of...
Spin models with critical ground space degeneracy from Lie algebra relations
Andras Molnar, Efekan Kökcü, Norbert Schuch +1 more·Aug 21, 2026
We introduce an $\mathrm{SO}(3)$-symmetric spin model derived from the algebraic structure of $\mathfrak{so}(3)$: It is obtained as the nearest-neighbor parent Hamiltonian of a Matrix Product State (MPS) built from the generators of the Lie algebra $...
Non-Hermitian sensing via end-to-end Green's functions
Hui-Qiang Liang, Yu-Shi Cheng, Guo-Fu Xu·Aug 21, 2026
Sensing hinges on two key attributes: high sensitivity and resilience to noise. Here, we present a scheme that unites these features within a single framework. By harnessing the exponential amplification of end-to-end Green's functions-a direct signa...
First-principles design of main-group dimer defects in ZnO as candidate quantum defects
Taejoon Park, Erik Alfredo Perez, Shimin Zhang +2 more·Aug 21, 2026
Zinc oxide (ZnO), a wide-band-gap semiconductor with mature growth techniques, is a promising host for optically active quantum spins. Yet, optically active quantum defects in ZnO remain largely unexplored. Here, we identify and characterize a family...
Revealing Physical Redundancy in the Two-dimensional Fermi-Hubbard Model via Transferable Observable Reconstruction
Ao-Ning Wang, Min-Quan He, Z. D. Wang·Aug 21, 2026
The Fermi-Hubbard model provides a paradigmatic setting for studying strongly correlated quantum matter, where different observables are commonly used to probe charge, interaction, and spin correlations. In this work, we investigate whether these obs...
Coherence-Based Identification of Carbon-Based Spin Qubits in Hexagonal Boron Nitride from First Principles
Hyeonsu Kim, Jaewook Lee, Huijin Park +1 more·Aug 21, 2026
Carbon-related defects in hexagonal boron nitride are promising room-temperature single-spin qubits and quantum sensors, but their atomic structures remain largely unidentified. Here we show, using first-principles calculations of electron-spin decoh...
Quantum phase estimation for nondestructive monitoring and Wigner tomography of bosonic fields
Lucas R. S. Santos, Ciro M. Diniz, Daniel Z. Rossatto +1 more·Aug 21, 2026
Quantum phase estimation is usually introduced as an algorithmic primitive for extracting eigenphases of unitary operators. Here we show that, when implemented through a dispersive light-matter interaction, it can also be used as a nondestructive mea...
The four-dimensional Chamon code
Zhipeng Liang, Xuan Wang·Aug 21, 2026
Fracton models have attracted considerable interest as candidates for quantum memories because of their unconventional ground-state degeneracy (GSD) and restricted-mobility excitations. The four-dimensional (4D) Chamon code introduced in our previous...
Qubits for Dark Matter Hunting
Takeo Moroi·Aug 21, 2026
An introductory review is provided for those who are interested in exploring applications of qubits and other quantum excitations to the detection of dark matter (and any other physics beyond the Standard Model). Topics covered include the fundamenta...
Hybrid dynamical decoupling and coherent driving for high-fidelity nuclear-spin control in diamond
Jiwon Jeon, Donghun Jung, Eunsang Lee +1 more·Aug 21, 2026
Nitrogen-vacancy (NV) centers in diamond provide room-temperature electron-nuclear spin registers for quantum sensing and quantum information processing, with surrounding 13C nuclear spins serving as long-lived quantum memories. However, coherent con...