HAL: hal-00343942, version 2

arXiv: 0812.0684

DOI: 10.1103/PhysRevA.79.023608

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Physical Review A: Atomic, Molecular and Optical Physics 79, 2 (2009) 023608

Available versions:

v1 (2008-12-03)

v2 (2009-01-12)

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

Christoph Weiss 1, 2, Heinz-Peter Breuer 3

(2009-06-02)

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.

1:	Oldenburg
	University of Oldenburg – Institut f. Physik
2:	Laboratoire Kastler Brossel (LKB (Lhomond))
	CNRS : UMR8552 – Université Pierre et Marie Curie [UPMC] - Paris VI – Ecole normale supérieure de Paris - ENS Paris
3:	Freiburg
	Physikalisches Institut, Albert-Ludwigs-Universitaet Freiburg

Subject

:

Physics/Condensed Matter/Other

Keyword(s): Bose-Einstein condensation – optical lattice – photon-assisted tunneling

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From: Christoph Weiss <>

Submitted on: Monday, 12 January 2009 10:51:55

Updated on: Friday, 6 February 2009 19:02:10