Papers
Live trends in quantum computing research, updated daily from arXiv.
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Scalar vacuum densities on Beltrami pseudosphere
T. A. Petrosyan·Jan 7, 2026
We investigate the combined effects of spatial curvature and topology on the properties of the vacuum state for a charged scalar field localized on the (2+1)-dimensional Beltrami pseudosphere, assuming that the field obeys quasiperiodicity condition ...
Interference-Induced Suppression of Doublon Transport and Prethermalization in the Extended Bose-Hubbard Model
Zhen-Ting Bao, Kai Xu, Heng Fan·Jan 7, 2026
The coherent mobility of doublons, arising from second-order virtual dissociation-recombination processes, fundamentally limits their use as information carriers in the strongly interacting Bose-Hubbard model. We propose a disorder-free suppression m...
Double interval entanglement in quasiparticle excited states
Zhouhao Guo, Jiaju Zhang·Jan 7, 2026
We investigate double-interval entanglement measures, specifically reflected entropy, mutual information, and logarithmic negativity, in quasiparticle excited states for classical, bosonic, and fermionic systems. We develop an algorithm that efficien...
Koopman Nonlinear Non-Hermitian Skin Effect
Shu Hamanaka·Jan 7, 2026
Non-Hermitian skin effects are conventionally manifested as boundary localization of eigenstates in linear systems. In nonlinear settings, however, where eigenstates are no longer well defined, it becomes unclear how skin effects should be faithfully...
Strip-Symmetric Quantum Codes for Biased Noise: Z-Decoupling in Stabilizer and Floquet Codes
Mohammad Rowshan·Jan 7, 2026
Bias-tailored codes such as the XZZX surface code and the domain wall color code achieve high dephasing-biased thresholds because, in the infinite-bias limit, their $Z$ syndromes decouple into one-dimensional repetition-like chains; the $X^3Z^3$ Floq...
Transmutation based Quantum Simulation for Non-unitary Dynamics
Shi Jin, Chuwen Ma, Enrique Zuazua·Jan 7, 2026
We present a quantum algorithm for simulating dissipative diffusion dynamics generated by positive semidefinite operators of the form $A=L^\dagger L$, a structure that arises naturally in standard discretizations of elliptic operators. Our main tool ...
Unitary Transformation of Two-Dimensional Spin-Orbit Coupled Models
Manish Kumar Mohanta·Jan 7, 2026
The Rashba, Dresselhaus, and Weyl Hamiltonians form a foundational framework for modeling spin-orbit interactions across condensed matter systems. Although they describe distinct material classes and produce seemingly different spin textures, they ar...
Local Scale Invariance in Quantum Theory: A Non-Hermitian Pilot-Wave Formulation
Indrajit Sen, Matthew Leifer·Jan 7, 2026
We show that Weyl's abandoned idea of local scale invariance has a natural realization at the quantum level in pilot-wave (de Broglie-Bohm) theory. We obtain the Weyl covariant derivative by complexifying the electromagnetic gauge coupling parameter....
Tailoring Dynamical Quantum Phase Transitions via Double-Mode Squeezing Manipulation
Kaiyuan Cao, Haodong Wang, Xiang-Ping Jiang +2 more·Jan 7, 2026
We propose a protocol to tailor dynamical quantum phase transitions (DQPTs) by double-mode squeezing onto the initial state in the XY chain. The effect of squeezing depends critically on the system's symmetry and parameters. When the squeezing operat...
Quantum Classical Ridgelet Neural Network For Time Series Model
Bahadur Yadav, Sanjay Kumar Mohanty·Jan 7, 2026
In this study, we present a quantum computing method that incorporates ridglet transforms into the quantum processing pipelines for time series data. Here, the Ridgelet neural network is integrated with a single-qubit quantum computing method, which ...
Many-body Quantum Score: a scalable benchmark for digital and analog quantum processors and first test on a commercial neutral atom device
Harold Erbin, Pierre-Louis Burdeau, Corentin Bertrand +2 more·Jan 6, 2026
We propose the Many-body Quantum Score (MBQS), a practical and scalable application-level benchmark protocol designed to evaluate the capabilities of quantum processing units (QPUs)--both gate-based and analog--for simulating many-body quantum dynami...
Optical Spectroscopy of Waveguide coupled Er$^{3+}$ ensembles in CaWO$_4$ and YVO$_4$
Fabian Becker, Anna Selzer, Lorenz J. J. Sauerzopf +4 more·Jan 6, 2026
We present an optical study of near-surface Er$^{3+}$ ensembles in waveguide-integrated CaWO$_4$ and YVO$_4$, investigating how nanophotonic coupling modifies rare-earth spectroscopy. In particular, we compare bulk excitation with evanescently couple...
Testing measurement-based computational phases of quantum matter on a quantum processor
Ryohei Weil, Dmytro Bondarenko, Arnab Adhikary +1 more·Jan 6, 2026
Many symmetry protected or symmetry enriched phases of quantum matter have the property that every ground state in a given such phase endows measurement based quantum computation with the same computational power. Such phases are called computational...
Hybrid non-degenerate parametric amplifier for a microwave cavity mode and an NV ensemble
Roman Ovsiannikov, Kurt Jacobs, Andrii G. Sotnikov +2 more·Jan 6, 2026
We introduce an implementation of a non-degenerate parametric amplifier in which the signal and idler modes, respectively, a microwave mode and an ensemble of spins (e.g., nitrogen-vacancy centers in diamond), are operated in their linear regime. Thi...
Multiphoton Interference with a symmetric SU(N) beam splitter and the generalization of the extended Hong-Ou-Mandel effect
Paul M. Alsing, Richard J. Birrittella, Peter L. Kaulfuss·Jan 6, 2026
We examine multiphoton interference with a symmetric $SU(N)$ beam splitter $S_N$, an extension of features of the $SU(2)$ 50/50 beam splitter extended Hong-Ou-Mandel (eHOM) effect, whereby one obtains a zero amplitude (probability) for the output coi...
Non-Markovian dynamics of the giant atom beyond the rotating-wave approximation
Mei Yu, Walter T. Strunz, Stefan Nimmrichter·Jan 6, 2026
Superconducting qubits coupled to meandering transmission lines or surface acoustic waves may realize giant artificial atoms, whose spatially separated coupling points give rise to long-lived non-Markovian dynamics. Previous studies were limited to t...
Enhancing Small Dataset Classification Using Projected Quantum Kernels with Convolutional Neural Networks
A. M. A. S. D. Alagiyawanna, Asoka Karunananda, A. Mahasinghe +1 more·Jan 6, 2026
Convolutional Neural Networks (CNNs) have shown promising results in efficiency and accuracy in image classification. However, their efficacy often relies on large, labeled datasets, posing challenges for applications with limited data availability. ...
Time-Dependent Dunkl-Pauli Oscillator in the Presence of the Aharonov-Bohm Effect
Boubakeur Khantoul, Ahmed Tedjani·Jan 6, 2026
We present an exact, time-dependent solution for a two-dimensional Pauli oscillator deformed by Dunkl operators in the presence of an Aharonov--Bohm (AB) flux. By replacing conventional momenta with Dunkl momenta and allowing arbitrary time dependenc...
Optimizing Fault-tolerant Cat State Preparation
Tom Peham, Erik Weilandt, Robert Wille·Jan 6, 2026
Cat states are an important resource for fault-tolerant quantum computing, where they serve as building blocks for a variety of fault-tolerant primitives. Consequently, the ability to prepare high-quality cat states at large fault distances is essent...
Grand-Canonical Typicality
Cedric Igelspacher, Roderich Tumulka, Cornelia Vogel·Jan 6, 2026
We study how the grand-canonical density matrix arises in macroscopic quantum systems. ``Canonical typicality'' is the known statement that for a typical wave function $Ψ$ from a micro-canonical energy shell of a quantum system $S$ weakly coupled to ...