Photon-assisted tunneling in optical lattices: Ballistic transport of interacting boson pairs
arXiv:0812.0684 · doi:10.1103/PhysRevA.79.023608
Abstract
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.
7 pages, 3 figures, minor changes
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Cited by in corpus (6)
- Expansion of matter waves in static and driven periodic potentials
- Fractional photon-assisted tunneling for Bose-Einstein condensates in a double well
- Nonlocal quantum superpositions of bright matter-wave solitons and dimers
- Spatial two-particle NOON-states in periodically shaken three-well potentials
- Effective time-reversal via periodic shaking
- Resonantly enhanced coherence by laser-assisted tunneling