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Communication Dans Un Congrès Année : 2006

The atomic Bose gas in Flatland

Zoran Hadzibabic
Marc Cheneau
Jean Dalibard

Résumé

We describe a recent experiment performed with rubidium atoms ($^{87}$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.
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Dates et versions

hal-00102179 , version 1 (29-09-2006)

Identifiants

Citer

Zoran Hadzibabic, Peter Krüger, Marc Cheneau, Baptiste Battelier, Jean Dalibard. The atomic Bose gas in Flatland. Atomic physics 20, proc of the XX international conference on atomic physics, 2006, Innsbruck, Austria. ⟨10.48550/arXiv.cond-mat/0609761⟩. ⟨hal-00102179⟩
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