Papers
Live trends in quantum computing research, updated daily from arXiv.
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Fluctuation-Induced Supersolidity at the Superfluid-Solid Interface
Baptiste Coquinot, Ragheed Alhyder, Alberto Cappellaro +1 more·Dec 9, 2025
Supersolidity, combining superfluid and crystalline orders, has been realized in dipolar Bose-Einstein condensates by tuning interatomic interactions. Here we show that supersolidity can also emerge from mode coupling at a superfluid-solid interface,...
The bound state of dark atom with the nucleus of substance
T. E. Bikbaev, M. Yu. Khlopov, A. G. Mayorov·Dec 9, 2025
The hypothesis of composite $XHe$ dark atoms offers a compelling framework to address the challenges in direct dark matter particles detection, as their neutral, atom-like configuration evades conventional experimental signatures. A critical issue ma...
Geometry-driven transitions in sparse long-range spin models with cold atoms
Alex Gunning, Aydin Deger, Sridevi Kuriyattil +1 more·Dec 9, 2025
We explore the influence of geometry in the critical behavior of sparse long-range spin models. We examine a model with interactions that can be continuously tuned to induce distinct changes in the metric, topology, and dimensionality of the coupling...
Non-Hermitian symmetry breaking and Lee-Yang theory for quantum XYZ and clock models
Tian-Yi Gu, Gaoyong Sun·Dec 9, 2025
Lee-Yang theory offers a unifying framework for understanding classical phase transitions and dynamical quantum phase transitions through the analysis of partition functions and Loschmidt echoes. Recently, this framework is extended to characterize q...
A Unified Framework for Optimizing Uniformly Controlled Structures in Quantum Circuits
Chengzhuo Xu, Xiao Chen, Xi Li +2 more·Dec 9, 2025
Quantum unitaries of the form $Σ_{c}\ket{c}\bra{c}\otimes U_{c}$ are ubiquitous in quantum algorithms. This class encompasses not only standard uniformly controlled gates (UCGs) but also a wide range of circuits with uniformly controlled structures. ...
Spectroscopic readout of chiral photonic topology in a single-cavity spin-orbit-coupled Bose-Einstein condensate
Kashif Ammar Yasir, Gao Xianlong·Dec 9, 2025
Topological photonic phases are typically identified through band reconstruction, steady-state transmission, or real-space imaging of edge modes. In this work, we present a framework for spectroscopic readout of chiral photonic topology in a single d...
Perfect continuous-variable quantum microcombs
Kangkang Li, Yue Wang, Ze Wang +7 more·Dec 9, 2025
Quantum microcombs generated in high-Q microresonators provide compact, multiplexed sources of entangled modes for continuous-variable (CV) quantum information processing. While deterministic generation of CV states via Kerr-induced two-mode squeezin...
Quantum Brownian Motion as a Classical Stochastic Process in Phase Space
Dmitriy Kondaurov, Evgeny Polyakov·Dec 9, 2025
We establish that the exact quantum dynamics of a Brownian particle in the Caldeira-Leggett model can be mapped, at any temperature, onto a classical, non-Markovian stochastic process in phase space. Starting from a correlated thermal equilibrium sta...
Strain sensitivity enhancement in a Grover-Michelson interferometer
Anthony D. Manni, Christopher R. Schwarze, David S. Simon +2 more·Dec 9, 2025
The Michelson interferometric phase detection resolution can be enhanced by replacing conventional beam splitters with novel directionally unbiased four-port scatterers, such as Grover coins. We present a quantitative analysis of the noise-to-signal ...
Parity erasure: a foundational principle for indefinite causal order
Zixuan Liu, Ognyan Oreshkov·Dec 9, 2025
Processes with indefinite causal order can arise when quantum theory is locally valid and they allow accomplishing new informational tasks. Despite recent progress, the correlations allowed in such processes have not been clearly understood. Here, we...
Operator Lanczos Approach enabling Neural Quantum States as Real-Frequency Impurity Solvers
Jonas B. Rigo, Markus Schmitt·Dec 9, 2025
To understand the intricate exchange between electrons of different bands in strongly correlated materials, it is essential to treat multi-orbital models accurately. For this purpose, dynamical mean-field theory (DMFT) provides an established framewo...
An Efficient Secret Communication Scheme for the Bosonic Wiretap Channel
Esther Hänggi, Iyán Méndez Veiga, Ligong Wang·Dec 9, 2025
We propose a new secret communication scheme over the bosonic wiretap channel. It uses readily available hardware such as lasers and direct photodetectors. The scheme is based on randomness extractors, pulse-position modulation, and Reed-Solomon code...
$\mathcal{PT}$-symmetric cavity magnomechanics with gain-assisted transparency and amplification
Cham Oumie, Wu-Ming Liu, Kashif Ammar Yasir·Dec 9, 2025
We investigate magnomechanically induced transparency in a parity-time-symmetric cavity magnomechanical system with traveling-field-induced non-Hermiticity. The setup consists of a microwave cavity mode coupled to magnons in a single-crystal yttrium ...
Anisotropic transport in ballistic bilayer graphene cavities
Florian Schoeppl, Alina Mrenca-Kolasinska, Ming-Hao Liu +3 more·Dec 9, 2025
Closing the gap between ray tracing simulations and experimentally observed electron jetting in bilayer graphene (BLG), we study all-electronic, gate-defined BLG cavities using tight-binding simulations and semiclassical equations of motion. Such cav...
Radiative process of tripartite entangled probes in inertial motion
Subhajit Barman, K. Hari·Dec 9, 2025
We study the radiative process of three entangled quantum probes initially prepared in a tripartite W state. As a basic set-up, we consider the probes to be inertial in flat spacetime and investigate how the radiative process is affected by different...
Internal spaces of fermion and boson fields, described with the superposition of odd and even products of $γ^{a}$, enable understanding of all the second-quantised fields in an equivalent way
N. S. Mankoč Borštnik·Dec 9, 2025
Using the odd and even ``basis vectors'', which are the superposition of odd and even products of $γ^a$'s, to describe the internal spaces of the second quantised fermion and boson fields, respectively, offers in even-dimensional spaces, like it is $...
Quantum simulation in the entanglement picture
D. -S. Wang, X. Xu, Y. -D. Liu·Dec 9, 2025
The notion of ``picture'' is fundamental in quantum mechanics. In this work, a new picture, which we call entanglement picture, is proposed based on the novel channel-state duality, whose importance is revealed in quantum information science. We illu...
$\ell$-Multiranks of Multipartite Quantum States via Tensor Flattening: A Mathematica Codebase
Masoud Gharahi·Dec 9, 2025
We present a Mathematica codebase for computing $\ell$-multilinear ranks ($\ell$-multiranks) of multiqudit quantum states using tensor-flattening techniques. By calculating the ranks of all bipartition-induced matricizations, the method provides an e...
An ETH-ansatz-motivated environmental-branch approach to open quantum systems
Wen-ge Wang·Dec 9, 2025
In this paper, a method is developed for the study of a generic small central quantum system, which is locally coupled to an environment as a many-body quantum chaotic system that satisfies the eigenstate thermalization hypothesis (ETH) ansatz. The a...
Tunable passive squeezing of squeezed light through unbalanced double homodyne detection
Niels Tripier-Mondancin, David Barral, Ganaël Roeland +3 more·Dec 9, 2025
The full characterization of quantum states of light is a central task in quantum optics and information science. Double homodyne detection provides a powerful method for the direct measurement of the Husimi Q quasi-probability distribution, offering...