The atomic Bose gas in Flatland
Other Condensed Matter
2016-08-16 v1 Atomic Physics
Abstract
We describe a recent experiment performed with rubidium atoms (Rb), aiming at studying the coherence properties of a two-dimensional gas of bosonic particles at low temperature. We have observed in particular a Berezinskii--Kosterlitz--Thouless (BKT) type crossover in the system, using a matter wave heterodyning technique. At low temperatures, the gas is quasi-coherent on the length scale set by the system size. As the temperature is increased, the loss of long-range coherence coincides with the onset of the proliferation of free vortices, in agreement with the microscopic BKT theory.
Cite
@article{arxiv.cond-mat/0609761,
title = {The atomic Bose gas in Flatland},
author = {Zoran Hadzibabic and Peter Krüger and Marc Cheneau and Baptiste Battelier and Jean B. Dalibard},
journal= {arXiv preprint arXiv:cond-mat/0609761},
year = {2016}
}
Comments
To appear in "ATOMIC PHYSICS 20" Proceedings of the XX International Conference on Atomic Physics (ICAP)