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Live trends in quantum computing research, updated daily from arXiv.
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Generalizing fusion rules by shuffle: Symmetry-based classifications of nonlocal systems constructed from similarity transformations
Yoshiki Fukusumi, Taishi Kawamoto·Dec 1, 2025
We study fusion rings, or symmetry topological field theories (SymTFTs), which lie outside the non-negative integer matrix representation (NIM-rep), by combining knowledge from generalized symmetry and that from pseudo-Hermitian systems. By applying ...
Quantum Advantage in Resource Estimation
William A. Simon, Peter J. Love·Dec 1, 2025
Quantum computing promises the ability to compute properties of quantum systems exponentially faster than classical computers. Quantum advantage is achieved when a practical problem is solved more efficiently on a quantum computer than on a classical...
Network theory classification of quantum matter based on wave function snapshots
Riccardo Andreoni, Vittorio Vitale, Cristiano Muzzi +3 more·Dec 1, 2025
Quantum computers and simulators offer unparalleled capabilities of probing quantum many-body states, by obtaining snapshots of the many-body wave function via collective projective measurements. The probability distribution obtained by such snapshot...
Observation of an anomaly in the statistics of Kibble-Zurek defects
Jan Balewski, Alexey Khudorozhkov, Siva Darbha +8 more·Dec 1, 2025
The Kibble-Zurek mechanism quantifies defect formation during adiabatic passage across a continuous phase transition, providing key insights into universality in quantum many-body systems. We explore counting statistics of defects in adiabatic passag...
Momentum entanglement at colliders: the $H \to WW,ZZ$ case
J. A. Aguilar-Saavedra·Dec 1, 2025
We address momentum entanglement in Higgs decays to weak boson pairs, $H \to WW,ZZ$, by discretising momentum space. The momenta of the two weak bosons are entangled, as well as the degrees of freedom in momentum and spin spaces. For $H \to ZZ$ in th...
Anomalies on the Lattice, Homotopy of Quantum Cellular Automata, and a Spectrum of Invertible States
Alexander M. Czajka, Roman Geiko, Ryan Thorngren·Dec 1, 2025
We develop a rigorous topological theory of anomalies on the lattice, which are obstructions to gauging global symmetries and the existence of trivial symmetric states. We also construct $Ω$-spectra of a class of invertible states and quantum cellula...
The measurement-induced phase transition in strongly disordered spin chains
Yicheng Tang, Pradip Kattel, Arijeet Pal +2 more·Dec 1, 2025
We investigate the dynamics of strongly disordered spin chains in the presence of random local measurements. By studying the transverse-field Ising model with a site-dependent random longitudinal field and an effective $l$-bit many-body localized Ham...
Parametric processes in nonlinear structures with reflections: an asymptotic-field approach
Tadeu Tassis, Salvador Poveda-Hospital, Nicolás Quesada +1 more·Dec 1, 2025
The generation of engineered quantum states of light via nonlinear processes is fundamental for quantum technologies based on photons. Although embedding nonlinear materials within resonant structures allows for the enhancement and tailoring of photo...
A Heptalemma for Quantum Mechanics
John B. DeBrota, Christian List·Dec 1, 2025
We present a seven-pronged no-go result for quantum mechanics: a "heptalemma". It shows that seven initially plausible theses about physical reality are jointly inconsistent with the predictions of quantum mechanics, while any six are jointly consist...
A List of Complexity Bounds for Property Testing by Quantum Sample-to-Query Lifting
Kean Chen, Qisheng Wang, Zhicheng Zhang·Dec 1, 2025
Quantum sample-to-query lifting, a relation between quantum sample complexity and quantum query complexity presented in Wang and Zhang (SIAM J. Comput. 2025), was significantly strengthened by Tang, Wright, and Zhandry (2025) to the case of state-pre...
Random matrix perspective on probabilistic error cancellation
Leonhard Moske, Pedro Ribeiro, Tomaž Prosen +3 more·Dec 1, 2025
Probabilistic error cancellation is an attempt to reverse the effect of dissipative noise channels on quantum computers by applying unphysical channels after the execution of a quantum algorithm on noisy hardware. We investigate on general grounds th...
Automated Compilation Including Dropouts: Tolerating Defective Components in Stabiliser Codes
Stasiu Wolanski·Dec 1, 2025
Utility-scale solid-state quantum devices will need to fabricate quantum devices at scale using imperfect processes. By introducing tolerance to fabrication defects into the design of the quantum devices, we can improve the yield of usable quantum ch...
High-Speed NV Ensemble Magnetic Field Imaging via Laser Raster Scanning
Luca Troise, Nikolaj W. Hansen, Marvin Holten +4 more·Dec 1, 2025
We present a technique that uses an ensemble of nitrogen-vacancy (NV) centers in diamond to image magnetic fields with high spatio-temporal resolution and sensitivity. A focused laser beam is raster-scanned using an acousto-optic deflector (AOD) and ...
Scalable Quantum Reversible BCD Adder Architectures with Enhanced Speed and Reduced Quantum Cost for Next-Generation Computing
Negin Mashayekhi, Mohammad Reza Reshadinezhad, Antonio Rubio +1 more·Dec 1, 2025
The quantum and reversible paradigm merges the principles of quantum mechanics and reversible computation to enable information-preserving processing. It supports next-generation computing architectures that provide improved scalability and enhanced ...
On-chip high-order parametric downconversion in the excitonic Mott insulator Nb$_3$Cl$_8$ for programmable multiphoton entangled states
Dmitry Skachkov, Dirk R. Englund, Michael N. Leuenberger·Dec 1, 2025
Spontaneous parametric downconversion (SPDC) and four-wave mixing in $χ^{(2)}$ and $χ^{(3)}$ media underpin most entangled-photon sources, but direct generation of higher-order entangled multiphoton states by $n$-th order parametric downconversion re...
Approximate pushforward designs and image bounds on approximations
Jakub Czartowski, Adam Sawicki, Karol Życzkowski·Dec 1, 2025
We extend the framework of quantum pushforward designs to the approximate setting, where averaging is achieved only up to finite precision. Using Schatten $p$-norms and Lipschitz continuity arguments, we derive bounds on the approximation parameters ...
A Fluctuation-Dissipation Structure of Quantum Dynamical Semigroups Reveals a Unique Internal Hamiltonian
Fabricio Toscano, Sergey Sergeev·Dec 1, 2025
We refine a fluctuation-dissipation framework for quantum dynamical semigroups to resolve a long-standing ambiguity in Markovian master equations. For finite-dimensional systems, we prove that the underlying diffusion-dissipation structure - rooted i...
Confinement-Induced Resonances in Rabi-Coupled Bosonic Mixtures
Andrea Tononi, Pietro Massignan·Dec 1, 2025
We consider coherently-coupled bosonic mixtures scattering at low energies in the presence of an external confinement along either one or two directions. We exactly solve the two-body scattering problem, showing that for large Rabi coupling the confi...
QGShap: Quantum Acceleration for Faithful GNN Explanations
Haribandhu Jena, Jyotirmaya Shivottam, Subhankar Mishra·Dec 1, 2025
Graph Neural Networks (GNNs) have become indispensable in critical domains such as drug discovery, social network analysis, and recommendation systems, yet their black-box nature hinders deployment in scenarios requiring transparency and accountabili...
Achievable Identification Rates in Noisy Bosonic Broadcast Channels
Zuhra Amiri, Janis Nötzel·Dec 1, 2025
Identification in quantum communication enables receivers to verify the presence of a message without decoding its entire content. While identification capacity has been explored for classical and finite-dimensional quantum channels, its behaviour in...