cond-mat.quant-gas papers

This category explores the fascinating world of quantum gases, where scientists cool atoms to temperatures near absolute zero to create exotic states of matter. In these extreme conditions, individual atoms begin to behave like a single giant wave, revealing strange quantum effects that are usually hidden in our everyday warm world. These experiments help researchers understand the fundamental rules governing matter and could one day lead to revolutionary new technologies like ultra-precise sensors or quantum computers.

On Gist.Science, we process every new preprint in this field directly from arXiv to make these complex discoveries accessible to everyone. Our team provides both plain-language overviews for the curious mind and detailed technical summaries for experts, ensuring you get the full picture without getting lost in the jargon. Below are the latest papers from arXiv in Cond-Mat — Quant-Gas, freshly summarized and ready for you to explore.

Phonon number relaxation in a 3D superfluid with a concave acoustic branch

This paper theoretically determines the relaxation dynamics of phonon number in a 3D superfluid with a concave acoustic branch, demonstrating that while four-phonon collisions only achieve partial equilibrium, the slower five-phonon collisions drive the system to complete thermochemical equilibrium with a specific time-dependent evolution of fugacity and entropy, thereby concluding a study initiated by Khalatnikov in 1950.

Yvan Castin (LKB), Mariia Tsimokha (LKB)2026-04-21🔬 cond-mat

Quantum quenches in a spin-1 chain with tunable symmetry

Using the time-evolving block decimation method, this study investigates the non-equilibrium dynamics of an anisotropic spin-1 Heisenberg chain, demonstrating how tuning the quadrupolar interaction parameter $J_q$ allows the system to transition from a non-integrable SU(2) model to an integrable SU(3) model characterized by a new conserved quantity that governs the accessibility of states.

Luis Eduardo Ramos-Solís, Sayan Choudhury, Freddy Jackson Poveda-Cuevas, Eduardo Ibarra-García-Padilla2026-04-21🔬 cond-mat

Fractional motions of an active particle on the quantum vortex

This paper analytically investigates the fractional diffusive motion of active particles driven by quantum vortices on superfluid helium surfaces, deriving joint probability density solutions for systems subject to viscoelastic memory, thermal noise, and harmonic confinement.

Yun Jeong Kang, Sung Kyu Seo, Kyungsik Kim2026-04-21🔬 cond-mat

Dissipative Preparation of Correlated Quantum States in Dipolar Rydberg Arrays

This paper proposes a scalable, dissipative protocol for neutral atom Rydberg arrays that utilizes controllable auxiliary atoms to engineer nonreciprocal, energy-selective transitions, thereby enabling the stabilization of arbitrary correlated many-body quantum states across the spectrum without requiring prior knowledge of the system's Hamiltonian.

Mingsheng Tian, Zhen Bi, Thomas Iadecola, Bryce Gadway2026-04-21🔬 physics.atom-ph

INTENTAS -- An entanglement-enhanced atomic sensor for microgravity

The INTENTAS project aims to develop a compact, all-optical atomic sensor utilizing entangled Bose-Einstein condensates in a microgravity environment to achieve high-precision quantum measurements, with a successful ground-based demonstration paving the way for future space deployment.

O. Anton, I. Bröckel, D. Derr, A. Fieguth, M. Franzke, M. Gärtner, E. Giese, J. S. Haase, J. Hamann, A. Heidt, S. Kanthak, C. Klempt, J. Kruse, M. Krutzik, S. Kubitza, C. Lotz, K. Müller, J. Pah (…)2026-04-20🔬 physics.atom-ph

Orthogonalization speed-up from quantum coherence after a sudden quench

This paper introduces a nonequilibrium phenomenon where quantum coherence in an initial superposition state accelerates the orthogonalization of a quantum system following a sudden interaction quench, manifesting as a power-law decay in work distribution and a reduction in the minimal orthogonalization time, with a proposed experimental verification using Ramsey interferometry in trapped cold atoms.

Beatrice Donelli, Gabriele De Chiara, Francesco Scazza, Stefano Gherardini2026-04-20⚛️ quant-ph

Josephson Dynamics in 2D Ring-shaped Condensates

This study demonstrates Josephson transport in a closed 2D ring-shaped Bose-Einstein condensate with two movable optical barriers, revealing a critical current threshold where the system transitions from a dissipationless dc branch to a resistive ac regime mediated by vortex-antivortex pairs, thereby establishing a versatile cold-atom analogue of a SQUID for atomtronic applications.

Koon Siang Gan, Vijay Pal Singh, Luigi Amico, Rainer Dumke2026-04-20🔬 cond-mat

Spin-spiral instability of the Nagaoka ferromagnet in the crossover between square and triangular lattices

This paper investigates the hard-core Fermi-Hubbard model on lattices interpolating between square and triangular geometries near half-filling, identifying the precise phase transition where Nagaoka ferromagnetism becomes unstable and gives way to a spin-spiral state driven by geometric frustration.

Darren Pereira, Erich J. Mueller2026-04-20🔬 cond-mat

Engineering Anderson Localization in Arbitrary Dimensions with Interacting Quasiperiodic Kicked Bosons

This paper demonstrates that combining interparticle interactions with quasiperiodic driving in a kicked boson system creates synthetic dimensions, enabling the emulation of Anderson localization and its critical behavior in arbitrary dimensions up to four.

H. Olsen, P. Vignolo, M. Albert2026-04-20🔬 cond-mat

Localization from Infinitesimal Kinetic Grading: Finite-size Scaling, Kibble-Zurek Dynamics and Applications in Sensing

This paper investigates a one-dimensional lattice model with power-law graded hopping amplitudes, demonstrating that its kinetic-grading-induced localization transition exhibits critical behavior describable by finite-size scaling and Kibble-Zurek dynamics, which can be harnessed to achieve quantum-enhanced parameter estimation through critical scaling of the quantum Fisher information.

Argha Debnath, Ayan Sahoo, Debraj Rakshit2026-04-20🔬 cond-mat

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