Controlling two-species Mott-insulator phses in an optical lattice to form an array of dipolar molecules

Abstract

We consider the transfer of a two-species Bose-Einstein condensate into an optical lattice with a density such that that a Mott-insulator state with one atom per species per lattice site is obtained in the deep lattice regime. Depending on collision parameters the result could be either a `mixed' or a `separated' Mott-insulator phase. Such a `mixed' two-species insulator could then be photo-associated into an array of dipolar molecules suitable for quantum computation or the formation of a dipolar molecular condensate. For the case of a ${}^{87}$Rb-${}^{41}$K two-species BEC, however, the large inter-species scattering length makes obtaining the desired `mixed' Mott insulator phase difficult. To overcome this difficulty we investigate the effect of varying the lattice frequency on the mean-field interaction and find a favorable parameter regime under which a lattice of dipolar molecules could be generated.

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• Interference of atomic levels and superfluid -- Mott insulator phase transition in a two-component Bose-Einstein condensate
• Bell-type inequalities for cold heteronuclear molecules
• A Molecular Micromaser
• Correlation and entanglement of two-component Bose-Einstein condensates in a double well
• Phase Coherence in a Driven Double-Well System
• Quantum optics of ultra-cold molecules