Lifetime of the Bose Gas with Resonant Interactions
Quantum Gases
2013-05-14 v3
Abstract
We study the lifetime of a Bose gas at and around unitarity using a Feshbach resonance in lithium~7. At unitarity, we measure the temperature dependence of the three-body decay coefficient . Our data follow a law with \lambda_{3} = 2.5(3)_{stat}_(6)_{sys} 10^{-20} (\mu K)^2 cm^6 s^{-1} and are in good agreement with our analytical result based on the zero-range theory. Varying the scattering length at fixed temperature, we investigate the crossover between the finite-temperature unitary region and the previously studied regime where is smaller than the thermal wavelength. We find that is continuous across resonance, and over the whole range our data quantitatively agree with our calculation.
Cite
@article{arxiv.1212.5274,
title = {Lifetime of the Bose Gas with Resonant Interactions},
author = {B. S. Rem and A. T. Grier and I. Ferrier-Barbut and U. Eismann and T. Langen and N. Navon and L. Khaykovich and F. Werner and D. S. Petrov and F. Chevy and C. Salomon},
journal= {arXiv preprint arXiv:1212.5274},
year = {2013}
}