Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas

Autor:	Fletcher, Richard J., Robert-de-Saint-Vincent, Martin, Man, Jay, Navon, Nir, Smith, Robert P., Viebahn, Konrad G. H., Hadzibabic, Zoran
Rok vydání:	2015
Předmět:	Condensed Matter - Quantum Gases Condensed Matter - Statistical Mechanics Physics - Atomic Physics Quantum Physics
Zdroj:	Phys. Rev. Lett. 114, 255302 (2015)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.114.255302
Popis:	We study the critical point for the emergence of coherence in a harmonically trapped two-dimensional Bose gas with tuneable interactions. Over a wide range of interaction strengths we find excellent agreement with the classical-field predictions for the critical point of the Berezinskii-Kosterlitz-Thouless (BKT) superfluid transition. This allows us to quantitatively show, without any free parameters, that the interaction-driven BKT transition smoothly converges onto the purely quantum-statistical Bose-Einstein condensation (BEC) transition in the limit of vanishing interactions. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1501.02262 Zobrazit plný text záznamu View this record from Arxiv