Papers
Live trends in quantum computing research, updated daily from arXiv.
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Long-range resonances in quasiperiodic many-body localization
Ashirbad Padhan, Jeanne Colbois, Fabien Alet +1 more·Oct 28, 2025
We investigate long-range resonances in quasiperiodic many-body localized (MBL) systems. Focusing on the Heisenberg chain in a deterministic Aubry-André potential, we complement standard diagnostics by analyzing the structure of long-distance pairwis...
Renormalization-group-based preparation of matrix product states on up to 80 qubits
Moritz Scheer, Alberto Baiardi, Elisa Bäumer Marty +2 more·Oct 28, 2025
A key challenge for quantum computers is the efficient preparation of many-body entangled states across many qubits. In this work, we demonstrate the preparation of matrix product states (MPS) using a renormalization-group(RG)-based quantum algorithm...
Hyperfine-resolved optical spectroscopy of ultracold $^{87}$Rb$^{133}$Cs molecules: the $\mathrm{b}\,^3Π_0$ metastable state
Arpita Das, Albert Li Tao, Luke M. Fernley +6 more·Oct 28, 2025
Using an ultracold gas of $^{87}$Rb$^{133}$Cs molecules, we perform hyperfine-resolved spectroscopy of transitions from the vibronic ground state to the lowest rovibrational states of the electronic state $\mathrm{b}\,^3Π_0$, as a function of magneti...
Accelerated relaxation and Mpemba-like effect for operators in open quantum systems
Pitambar Bagui, Arijit Chatterjee, Bijay Kumar Agarwalla·Oct 28, 2025
Quantum Mpemba effect occurs when a quantum system, residing far away from the steady state, relaxes faster than a relatively nearer state. We look for the presence of this highly counterintuitive effect in the relaxation dynamics of the operators wi...
Fields of covariances on non-commutative probability spaces in finite dimensions
Florio M. Ciaglia, Fabio Di Cosmo, Laura González-Bravo·Oct 28, 2025
We introduce the notion of a field of covariances, a contravariant functor from non-commutative probability spaces to Hilbert spaces, as the natural categorical analogue of statistical covariance. In the case of finite-dimensional non-commutative pro...
Efficient magic state cultivation with lattice surgery
Yutaka Hirano, Riki Toshio, Tomohiro Itogawa +1 more·Oct 28, 2025
Magic state distillation plays a crucial role in fault-tolerant quantum computation and represents a major bottleneck. In contrast to traditional logical-level distillation, physical-level distillation offers significant overhead reduction by enablin...
A No-Go Theorem for Shaping Quantum Resources
Samuel Alperin·Oct 28, 2025
The ability to engineer non-Gaussian quantum resources underlies quantum technologies from communication and metrology to universal computation. However, while a number of canonical works have set no-go limits for attaining such resources from Gaussi...
The high-dimension limit of characters of compact reductive Lie groups and restrictions on the production of quantum randomness
Piotr Borodako, Adam Sawicki·Oct 28, 2025
For any element $g$ of compact reductive group $G$ we investigate the asymptotic behavior of its normalized irreducible character in the high-dimension limit, $\frac{χ_λ(g)}{d_λ}$. We show that when $G$ is simple the limit vanishes besides identity e...
Approaching the Thermodynamic Limit of an Ideal Gas
Prabal Adhikari, Brian Tiburzi, Sona Baghiyan·Oct 28, 2025
For a gas confined in a container, particle-wall interactions produce modifications to the partition function involving the average surface density of gas particles. While such correlations have a vanishing effect in the thermodynamic limit, examinin...
An efficient preconditioned conjugate-gradient solver for a two-component dipolar Bose-Einstein condensate
Weijing Bao, Zhenhao Wang, Jia-Rui Luo +1 more·Oct 28, 2025
We develop a preconditioned nonlinear conjugate-gradient solver for ground states of binary dipolar Bose-Einstein condensates within the extended Gross-Pitaevskii equation including Lee-Huang-Yang corrections. The optimization is carried out on the p...
Quantum-Resistant Networks Using Post-Quantum Cryptography
Xin Jin, Nitish Kumar Chandra, Mohadeseh Azari +2 more·Oct 28, 2025
Quantum networks rely on both quantum and classical channels for coordinated operation. Current architectures employ entanglement distribution and key exchange over quantum channels but often assume that classical communication is sufficiently secure...
LEVITAS: Levitodynamics for Accurate Individual Particle Sensing in Space
Rafal Gajewski, Ravindra T Desai, James Bateman +3 more·Oct 28, 2025
Accurately observing the rarefied media of the upper atmosphere, exosphere, and planetary and solar system environments and beyond requires highly sensitive metrological techniques. We present the operating concept and architecture of an in-situ sens...
Quantum Combinatorial Reasoning for Large Language Models
Carlos Flores-Garrigos, Gaurav Dev, Michael Falkenthal +5 more·Oct 28, 2025
We design and implement a quantum combinatorial reasoning framework for large language models (QCR-LLM), integrating a real quantum computer in the hybrid workflow. QCR-LLM reformulates reasoning aggregation as a higher-order unconstrained binary opt...
From Quantum Relative Entropy to the Semiclassical Einstein Equations
Philipp Dorau, Albert Much·Oct 28, 2025
We provide arguments indicating that the semiclassical Einstein equations follow from quantum relative entropy and its proportionality to an area variation. Using modular theory, we establish that the relative entropy between the vacuum state and coh...
Comparing physical quantities with finite-precision: beyond standard metrology and an illustration for cooling in quantum processes
Anindita Sarkar, Paranjoy Chaki, Priya Ghosh +1 more·Oct 28, 2025
We propose a general framework to compare the values of a physical quantity pertaining to two - or more - physical setups, in the finite-precision scenario. Such a situation requires us to compare between two "patches" on the real line instead of two...
Fundamental limit on the heralded single photons' spectral brightness
Tse-Yu Lin, Wei-Kai Huang, Pei-Yu Tu +2 more·Oct 28, 2025
The heralded single photons' (HSPs) spectral brightness (SB) is defined as the generation rate per linewidth. As the generation rate of HSPs gets larger or the photons' linewidth becomes narrower, both of which are desirable in quantum information pr...
Strong quantum interaction between excitons bound by cavity photon exchange
Miguel S. Oliveira, Cristiano Ciuti·Oct 28, 2025
We theoretically predict the interaction between polaritonic excitations arising from the coupling of a cavity photon mode with bound to continuum intersubband transitions in a doped quantum well. The resulting exciton bound by photon exchange, recen...
Thermally Assisted Supersolidity in a Dipolar Bose-Einstein Condensate
Changjian Yu, Jinbin Li, Kui-Tian Xi·Oct 28, 2025
Supersolidity in a dipolar Bose-Einstein condensate (BEC), which is the coexistence of crystalline density modulation and global phase coherence, emerges from the interplay of contact interactions, long-range dipole-dipole forces, and quantum fluctua...
A Remarkable Application of Zassenhaus Formula to Strongly Correlated Electron Systems
Louis Jourdan, Patrick Cassam-Chenaï·Oct 28, 2025
We show that the Zassenhaus decomposition for the exponential of the sum of two non-commuting operators, simplifies drastically when these operators satisfy a simple condition, called the no-mixed adjoint property. An important application to a Unita...
Tight Generalization Bound for Supervised Quantum Machine Learning
Xin Wang, Rebing Wu·Oct 28, 2025
We derive a tight generalization bound for quantum machine learning that is applicable to a wide range of supervised tasks, data, and models. Our bound is both efficiently computable and free of big-O notation. Furthermore, we point out that previous...