Quantum melting of a crystal of dipolar bosons

Details Quantum melting of a crystal of dipolar bosons Quantum melting of a crystal of dipolar bosons

2007-03-23

arxiv.org/abs/cond-mat/0703620v1

Phys. Rev. B 76, 064511 (2007)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 8 figures

Scientific paper

10.1103/PhysRevB.76.064511

We investigate the behaviour of dipolar bosons in two dimensions. We describe the large density crystalline limit analytically while we use quantum Monte-Carlo to study the melting toward the Bose-Einstein condensate. We find strong evidence for a first order transition. We characterize the window of experimentally accessible parameters in the context of ultracold bosons and show that observing the quantum melting should be within grasp once one is able to form cold heteronuclear molecules. Close to the melting, we can not conclude on the existence of a supersolid phase due to an insufficient overlap of our variational Bijl-Jastrow Ansatz with the actual ground state.

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