665 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.
This paper proposes a one-dimensional non-Hermitian four-band lattice model to demonstrate that distinct knot topologies in momentum space correspond to specific magnitudes of many-body ground state entanglement entropy, thereby establishing a direct link between knot topology and physical entanglement properties through spectral winding numbers, analytic phase boundaries, and fidelity susceptibility.
Using auxiliary-field quantum Monte Carlo simulations, this study provides precise thermodynamic benchmarks for the strongly interacting two-dimensional Fermi gas, identifying signatures of a pseudogap regime where pairing correlations persist above the superfluid critical temperature.
This paper presents an exact solution to the quantum kinetic equation for a weakly interacting Fermi gas across the classical-to-quantum crossover, utilizing tailored orthogonal polynomials to accurately compute transport coefficients and demonstrating that the relaxation-time approximation fails significantly at low temperatures.
This paper introduces a family of ground-state solvable many-body systems on graphs where distinguishable continuous-variable particles interact via Jastrow-type wavefunctions determined by the graph's adjacency matrix, leading to parent Hamiltonians that feature both two-body interactions and three-body interactions along graph paths.
This paper reports the first observation of interaction-induced, continuously tunable Fermi surface deformations in a deeply degenerate gas of microwave-shielded polar molecules, demonstrating a highly controllable platform for exploring strongly correlated dipolar quantum matter.
This paper demonstrates that two spatially separated polaritonic condensates can be driven into a steady entangled state via resonant pumping with entangled photon pairs, providing estimates for the required flux and the resulting entanglement lifetime despite environmental noise.
This paper investigates the impact of attractive and repulsive contact interactions on the nonlinear dynamics of one-dimensional fuzzy dark matter, revealing that while these interactions modify stationary density profiles and collapse stages, they do not enable relaxation to the lowest-energy stationary state.
This paper reports the emergence of metastable confinement and resonant string breaking in U(1) lattice gauge theories simulated by Rydberg atom arrays, demonstrating how the competition between string tension and four-Fermi coupling, along with Floquet-driven sideband resonances, enables controlled melting of initial string states.
This paper develops a general theory of spin-dependent density-density correlations in Fermi gases across the BCS-BEC crossover by leveraging gauge invariance and the Pauli principle to demonstrate that two-particle irreducible contributions are essential for explaining experimental observations, such as the minimum in opposite-spin correlations seen in 6Li.
This paper numerically demonstrates that a finite-time thermodynamic refrigeration cycle, implemented via time-dependent potential barriers in three spatially separated, weakly interacting Bose-Einstein condensates, successfully achieves cumulative cooling of approximately 27% over two cycles despite mass transfer and sound excitations.