2012/11/08 by Paolo Facchi, Saverio Pascazio, Francesco V. Pepe +3
Physics and Astronomy · #quant-ph #cond-mat.quant-gas
paper · pdf · doi:10.1088/0031-8949/2013/t153/014024
published as Phys. Scr. T153 (2013) 014024 · 12 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1201.6286
arxiv created 2012/11/08 · arxiv updated 2013/05/16
We study the time evolution of a Bose-Einstein condensate in an accelerated optical lattice. When the condensate has a narrow quasimomentum distribution and the optical lattice is shallow, the survival probability in the ground band exhibits a steplike structure. In this regime we establish a connection between the wave-function renormalization parameter Z and the phenomenon of resonantly enhanced tunneling.