Tuning the Mott transition in a Bose-Einstein condensate by multi-photon absorption

Details Tuning the Mott transition in a Bose-Einstein condensate by multi-photon absorption Tuning the Mott transition in a Bose-Einstein condensate by multi-photon absorption

2006-04-04

arxiv.org/abs/cond-mat/0604095v2

Phys. Rev. Lett. 96, 210403 (2006)

Physics

Condensed Matter

Other Condensed Matter

Minor changes, this version to be published in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.96.210403

We study the time-dependent dynamics of a Bose-Einstein condensate trapped in an optical lattice. Modeling the system as a Bose-Hubbard model, we show how applying a periodic driving field can induce coherent destruction of tunneling. In the low-frequency regime, we obtain the novel result that the destruction of tunneling displays extremely sharp peaks when the driving frequency is resonant with the depth of the trapping potential (``multi-photon resonances''), which allows the quantum phase transition between the Mott insulator and the superfluid state to be controlled with high precision. We further show how the waveform of the field can be chosen to maximize this effect.

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