Periodic instanton method and macroscopic quantum tunneling between two weakly-linked Bose-Einstein condensates
Mesoscale and Nanoscale Physics
2009-10-31 v2 Quantum Physics
Abstract
A new method is used to investigate the tunneling between two weakly-linked Bose-Einstein condensates confined in double-well potential traps. The nonlinear interaction between the atoms in each well contributes to a finite chemical potential, which, with consideration of periodic instantons, leads to a remarkably high tunneling frequency. This result can be used to interpret the newly found Macroscopic Quantum Self Trapping (MQST) effect. Also a new kind of first-order crossover between different regions is predicted.
Cite
@article{arxiv.cond-mat/0012491,
title = {Periodic instanton method and macroscopic quantum tunneling between two weakly-linked Bose-Einstein condensates},
author = {Yunbo Zhang and H. J. W. Müller-Kirsten},
journal= {arXiv preprint arXiv:cond-mat/0012491},
year = {2009}
}
Comments
4 pages, 2 eps figures, final version to appear in Phys. Rev. A