🔬 Category

cond-mat.quant-gas

656 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.

Luttinger's Theorem Violation and Green's Function Topological Invariants in a Fractional Chern Insulator

Using exact diagonalization of the fermionic Harper-Hofstadter-Hubbard model, this study demonstrates the violation of Luttinger's theorem in fractional Chern insulators and elucidates how the fractional many-body Chern number and integer Green's function invariants are encoded in the Středa responses of the Luttinger integral and count, respectively, while proposing an experimental protocol to extract these topological invariants via local density-of-states measurements.

Anton A. Markov, Andrey M. Nikishin, Nigel R. Cooper, Nathan Goldman, Lucila Peralta Gavensky2026-03-19🔬 cond-mat

Emergent superconformal symmetry in the phase diagram of a 1D Z2\mathbb{Z}_{2} lattice gauge theory

By deriving an exact mapping of a one-dimensional Z2\mathbb{Z}_{2} lattice gauge theory to decoupled XXZ and transverse-field Ising chains, the authors combine analytical and numerical methods to reveal a full phase diagram featuring emergent superconformal symmetry along a multi-critical line where fermionic and bosonic velocities coincide.

Bachana Beradze, Mikheil Tsitsishvili, Sergej Moroz2026-03-19⚛️ hep-th

Systematic solitary waves by linear limit continuation from two anisotropic traps in two-dimensional Bose-Einstein condensates

This paper applies the linear limit continuation method to systematically construct and analyze numerically exact solitary waves in two-dimensional Bose-Einstein condensates under two typical anisotropic harmonic traps, tracing their evolution from the near-linear regime through the Thomas-Fermi regime to isotropic limits while mapping their parametric connectivity.

Wenlong Wang2026-03-19🌀 nlin

Measuring temporal entropies in experiments

This paper proposes and validates via tensor network simulations a novel experimental protocol using local operators and geometric double quenches on replicated systems to measure generalized temporal entropies, thereby providing a physical interpretation of these quantities and demonstrating their utility in distinguishing between integrable and non-integrable dynamical classes in quantum many-body systems.

Aleix Bou-Comas, Carlos Ramos Marimón, Jan T. Schneider, Stefano Carignano, Luca Tagliacozzo2026-03-18⚛️ hep-th

The fate of the Fermi surface coupled to a single-wave-vector cavity mode

This paper theoretically solves the problem of competing instabilities in an ultracold Fermi gas coupled to a single-wave-vector cavity mode, revealing that while attractive interactions drive a density-wave instability, repulsive interactions favor non-superradiant superfluid phases and universally deform the Fermi surface, with these phenomena being accessible to current experimental setups.

Bernhard Frank, Michele Pini, Johannes Lang, Francesco Piazza2026-03-18🔬 physics.atom-ph

Quantum thermal state preparation for near-term quantum processors

This paper introduces a simple and efficient algorithm for preparing quantum thermal states on near-term processors by combining engineered bath resetting with modulated system-bath coupling, which achieves a fixed point approximating the Gibbs state with second-order accuracy in coupling strength and has been validated numerically for both the 2D Quantum Ising model and free-fermion systems.

Jerome Lloyd, Dmitry A. Abanin2026-03-18⚛️ quant-ph