Slow Thermalization between a Lattice and Free Bose Gas
نویسندگان
چکیده
منابع مشابه
Fast thermalization and Helmholtz oscillations of an ultracold Bose gas.
We analyze theoretically the transport properties of a weakly interacting ultracold Bose gas enclosed in two reservoirs connected by a constriction. We assume that the transport of the superfluid part is hydrodynamic, and we describe the ballistic transport of the normal part using the Landauer-Büttiker formalism. Modeling the coupled evolution of the phase, atom number, and temperature mismatc...
متن کاملInteracting Bose Gas in an Optical Lattice
A grand canonical system of hard-core bosons in an optical lattice is considered. The bosons can occupy randomly N equivalent states at each lattice site. The limit N → ∞ is solved exactly in terms of a saddle-point integration, representing a weakly-interacting Bose gas. In the limit N → ∞ there is only a condensate if the fugacity of the Bose gas is larger than 1. Corrections in 1/N increase ...
متن کاملInteracting Bose gas on the Lattice
A Lower bound for the density of a Bose gas in Z in the grand canonical ensemble is calculated for general dimension d, and for l(Z) potential interactions. The rigorous formalism of the measure on continuous time random walks, analogous to the Wiener measure, is briefly explained, along with justification of the Feynman-Kac formula using this. These are then used to bound the density, although...
متن کاملThermalization of a parametrically driven magnon gas leading to Bose-Einstein condensation.
The thermalization of parametrically pumped magnons caused by nonlinear multimagnon scattering processes and leading to the magnon Bose-Einstein condensation is investigated experimentally with high temporal resolution. The threshold pumping power necessary for the thermalization is determined. For pumping powers above this threshold the thermalization time has been found to decrease rapidly wi...
متن کاملFree Energy of a Dilute Bose Gas: Lower Bound
A lower bound is derived on the free energy (per unit volume) of a homogeneous Bose gas at density ̺ and temperature T . In the dilute regime, i.e., when a̺ ≪ 1, where a denotes the scattering length of the pair-interaction potential, our bound differs to leading order from the expression for non-interacting particles by the term 4πa(2̺−[̺−̺c]+). Here, ̺c(T ) denotes the critical density for Bose-Ein...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2013
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.111.063002