658 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 introduces a novel framework for engineering persistent coherent oscillations in Markovian open quantum systems by utilizing block-diagonal Hamiltonian and jump operator structures to sustain non-zero dissipative dynamics, thereby extending beyond traditional decoherence-free subspace approaches.
This paper investigates how the parameters of phase contrast imaging in cold atom systems influence both the observation and the backaction on a Bose-Einstein condensate array, revealing regimes where the measurement selectively probes bare particles or quasiparticles while offering control over measurement-induced quasiparticle creation and diffusion.
This paper demonstrates that Bayesian post-correction of non-Markovian errors in bosonic lattice gravimetry via in situ measurements can recover Heisenberg-limited precision, provided the number of trapping modes is at least two greater than the number of independent error sources.
This paper proposes a spin-dependent Kronig-Penney lattice realization of a triangular ladder for ultracold atoms that, through controllable pair hopping and geometric frustration, gives rise to robust pair superfluid and chiral superfluid phases as confirmed by density matrix renormalization group calculations and XXZ spin model mapping.
The paper demonstrates that for open quantum systems coupled to Gaussian environments, the evolution can be described by a Markovian quantum master equation with an error that decreases exponentially with the inverse system-bath coupling strength, achieved through a generalized Born-Markov approximation that can be iterated to arbitrarily high orders.
This study investigates the thermodynamic properties of finite Su-Schrieffer-Heeger chains, revealing a distinct metastable phase marked by heat capacity anomalies that emerges from hopping asymmetry and finite-size effects, thereby uncovering a rich bulk phase structure separate from topological boundary-driven transitions.
Using Monte Carlo simulations, this study reveals that soft-core bosons in shallow spherical traps form concentric icosahedral and dodecahedral shell clusters exhibiting non-uniform superfluidity that vanishes with heating while clusters persist, a phenomenon predicted to be observable in Rydberg-dressed atom bubble traps.
This paper clarifies the origin of the geometric contribution to the superfluid density in neutron star inner crusts by deriving its dependence on the pairing gap within a multi-band framework and demonstrating that accounting for corrections to Bogoliubov quasi-particle states, rather than just Hartree-Fock single-particle states, is essential for its emergence.
This paper proposes an efficient, spectrally accurate, and memory-economic numerical method combining a preconditioned conjugate gradient algorithm with an anisotropic truncated kernel method to compute the complex ground states of three-dimensional rotating dipolar Bose-Einstein condensates under strongly anisotropic traps, successfully addressing challenges like kernel singularities and fast rotation to reveal novel patterns such as bent vortices.
This paper establishes that dynamical quantum phase transitions (DQPTs) in generic quadratic fermionic systems are fundamentally characterized by the restoration of spin-flip symmetry in specific zero-energy dynamical critical modes, providing a unified framework that explains the necessary but insufficient conditions for DQPTs and their relationship to ground-state quantum phase transitions.