On the critical point of an interacting two-dimensional trapped Bose gas

Tapio Simula

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Abstract

We consider a quantized vortex excitation in a two-dimensional, harmonically trapped Bose gas and derive an equation for the Berezinskii-Kosterlitz-Thouless transition temperature based on a simple free-energy argument. We relate the critical phase-space density at the transition to the ratio between the entropy gain and the corresponding cost in energy of creating a free vortex excitation in the system. A? 2009 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.
Original languageEnglish
Pages (from-to)453 - 455
Number of pages3
JournalEuropean Physical Journal B
Volume68
Issue number3
DOIs
Publication statusPublished - 2009
Externally publishedYes

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