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.
@article{arxiv.1211.1822,
title = {Unearthing wave-function renormalization effects in the time evolution of a Bose-Einstein condensate},
author = {Paolo Facchi and Saverio Pascazio and Francesco V. Pepe and Ennio Arimondo and Donatella Ciampini and Oliver Morsch},
journal= {arXiv preprint arXiv:1211.1822},
year = {2013}
}
Comments
12 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1201.6286