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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2009

Photon-assisted tunneling in optical lattices: Ballistic transport of interacting boson pairs

Résumé

In a recent experiment [PRL 100, 040404 (2008)] an analog of photon-assisted tunneling has been observed for a Bose-Einstein condensate in an optical lattice subject to a constant force plus a sinusoidal shaking. Contrary to previous theoretical predictions, the width of the condensate was measured to be proportional to the square of the effective tunneling matrix element, rather than a linear dependence. For a simple model of two interacting bosons in a one-dimensional optical lattice, both analytical and numerical calculations indicate that such a transition from a linear to a quadratic dependence can be interpreted through the ballistic transport and the corresponding exact dispersion relation of bound boson pairs.
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Dates et versions

hal-00343942 , version 1 (03-12-2008)
hal-00343942 , version 2 (12-01-2009)

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Christoph Weiss, Heinz-Peter Breuer. Photon-assisted tunneling in optical lattices: Ballistic transport of interacting boson pairs. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2009, 79 (2), pp.023608. ⟨10.1103/PhysRevA.79.023608⟩. ⟨hal-00343942v2⟩
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