%0 Journal Article
%T Lifetime of the Bose Gas with Resonant Interactions
%A B. S. Rem
%A A. T. Grier
%A I. Ferrier-Barbut
%A U. Eismann
%A T. Langen
%A N. Navon
%A L. Khaykovich
%A F. Werner
%A D. S. Petrov
%A F. Chevy
%A C. Salomon
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevLett.110.163202
%X 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 $L_{3}$. Our data follow a $L_3 {=} \lambda_{3} / T^{2}$ 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 $a$ at fixed temperature, we investigate the crossover between the finite-temperature unitary region and the previously studied regime where $|a|$ is smaller than the thermal wavelength. We find that $L_{3}$ is continuous across resonance, and over the whole $a {<} 0$ range our data quantitatively agree with our calculation.
%U http://arxiv.org/abs/1212.5274v3