The Atomic Bose Gas in Flatland
Journal Article
·
· AIP Conference Proceedings
- Laboratoire Kastler Brossel, Ecole normale superieure, 24 rue Lhomond, 75005 Paris (France)
We describe a recent experiment performed with rubidium atoms (87Rb), 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.
- OSTI ID:
- 20894891
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 869; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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