Dissipative quantum dynamics of bosonic atoms in a shallow 1D optical lattice
Statistical Mechanics
2009-11-11 v2 Quantum Physics
Abstract
We theoretically study the dipolar motion of bosonic atoms in a very shallow, strongly confined 1D optical lattice using the parameters of the recent experiment [Fertig et al., Phys. Rev. Lett. 94, 220402 (2005)]. We find that, due to momentum uncertainty, a small, but non-negligible, atom population occupies the unstable velocity region of the corresponding classical dynamics, resulting in the observed dissipative atom transport. This population is generated even in a static vapor, due to quantum fluctuations which are enhanced by the lattice and the confinement, and is not notably affected by the motion of atoms or finite temperature.
Cite
@article{arxiv.cond-mat/0504026,
title = {Dissipative quantum dynamics of bosonic atoms in a shallow 1D optical lattice},
author = {J. Ruostekoski and L. Isella},
journal= {arXiv preprint arXiv:cond-mat/0504026},
year = {2009}
}
Comments
to appear in PRL