Structure, Bose-Einstein condensation and superfluidity of two-dimensional confined dipolar assemblies

Details Structure, Bose-Einstein condensation and superfluidity of two-dimensional confined dipolar assemblies Structure, Bose-Einstein condensation and superfluidity of two-dimensional confined dipolar assemblies

2011-04-04

arxiv.org/abs/1104.0710v2

Physics

Condensed Matter

Statistical Mechanics

10 pages, 9 figures

Scientific paper

Low temperature properties of harmonically confined two-dimensional assemblies of dipolar bosons are systematically investigated by Monte Carlo simulations. Calculations carried out for different numbers of particles and strengths of the confining potential yield evidence of a quantum phase transition from a superfluid to a crystal-like phase, consistently with what is observed in the ho- mogeneous system. It is found that the crystal phase nucleates in the center of the trap, as the density increases. Bose-Einstein condensation vanishes at T = 0 upon entering the crystalline phase, concurrently with the disappearance of the superfluid response.

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