Wave Function Renormalization Effects in Resonantly Enhanced Tunneling
Quantum Physics
2013-04-16 v1 Quantum Gases
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.
Cite
@article{arxiv.1201.6286,
title = {Wave Function Renormalization Effects in Resonantly Enhanced Tunneling},
author = {N. Lörch and F. V. Pepe and H. Lignier and D. Ciampini and R. Mannella and O. Morsch and E. Arimondo and P. Facchi and G. Florio and S. Pascazio and S. Wimberger},
journal= {arXiv preprint arXiv:1201.6286},
year = {2013}
}
Comments
12 pages