Ultracold dipolar gas in an optical lattice: the fate of metastable states

Details Ultracold dipolar gas in an optical lattice: the fate of metastable states Ultracold dipolar gas in an optical lattice: the fate of metastable states

2008-06-18

arxiv.org/abs/0806.2950v1

Phys. Rev. A 78, 043604 (2008)

Physics

Condensed Matter

Other Condensed Matter

15 pages, 19 figures

Scientific paper

10.1103/PhysRevA.78.043604

We study the physics of ultracold dipolar bosons in optical lattices. We show that dipole-dipole interactions lead to the appearance of many insulating metastable states. We study the stability and lifetime of these states using a generalization of the instanton theory. We investigate also possibilities to prepare, control and manipulate these states using time dependent superlattice modifications and modulations. We show that the transfer from one metastable configuration to another necessarily occurs via superfluid states, but can be controlled fully on the quantum level. We show how the metastable states can be created in the presence of the harmonic trap. Our findings open the way toward applications of the metastable states as quantum memories.

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