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

Abstract

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.

12 pages, 3 figures. arXiv admin note: substantial text overlap with arXiv:1201.6286

References in corpus (4)

• Time-resolved measurement of Landau--Zener tunneling in different bases
• Experimental Study of the Role of Atomic Interactions on Quantum Transport
• The rigged Hilbert space approach to the Gamow states
• Wave Function Renormalization Effects in Resonantly Enhanced Tunneling