Elliptic flow in a strongly-interacting normal Bose gas
Quantum Gases
2018-07-11 v2 Statistical Mechanics
Atomic Physics
Plasma Physics
Quantum Physics
Abstract
We study the anisotropic, elliptic expansion of a thermal atomic Bose gas released from an anisotropic trapping potential, for a wide range of interaction strengths across a Feshbach resonance. We show that in our system this hydrodynamic phenomenon is for all interaction strengths fully described by a microscopic kinetic model with no free parameters. The success of this description crucially relies on taking into account the reduced thermalising power of elastic collisions in a strongly interacting gas, for which we derive an analytical theory. We also perform time-resolved measurements that directly reveal the dynamics of the energy transfer between the different expansion axes.
Cite
@article{arxiv.1803.06338,
title = {Elliptic flow in a strongly-interacting normal Bose gas},
author = {Richard J. Fletcher and Jay Man and Raphael Lopes and Panagiotis Christodoulou and Julian Schmitt and Maximilian Sohmen and Nir Navon and Robert P. Smith and Zoran Hadzibabic},
journal= {arXiv preprint arXiv:1803.06338},
year = {2018}
}
Comments
4 pages, 3 figures