Wave Function Renormalization Effects in Resonantly Enhanced Tunneling

2012/01/30 by N. Lörch, F. V. Pepe, H. Lignier +8 · 1 citation
Physics and Astronomy · #quant-ph #cond-mat.quant-gas

paper · pdf · doi:10.1103/physreva.85.053602

published as Phys. Rev. A 85, 053602 (2012) · 12 pages

arxiv created 2012/01/30 · arxiv updated 2013/04/16

Abstract

We study the time evolution of ultra-cold atoms in an accelerated optical lattice. For a Bose- Einstein condensate with a narrow quasi-momentum distribution in a shallow optical lattice the decay of the survival probability in the ground band has a step-like structure. In this regime we establish a connection between the wave function renormalization parameter Z introduced in [Phys. Rev. Lett. 86, 2699 (2001)] to characterize non-exponential decay and the phenomenon of resonantly enhanced tunneling, where the decay rate is peaked for particular values of the lattice depth and the accelerating force.

Cited by

• Unearthing wave-function renormalization effects in the time evolution of a Bose-Einstein condensate

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