Elementary Excitations in Trapped BEC and Zero Mode Problem
Quantum Physics
2007-05-23 v1
Abstract
We propose a natural expansion of the atomic field operator in studying elementary excitations in trapped Bose-Einstein Condensation (BEC) system near T=0K. Based on this expansion, a system of coupled equations for elementary excitations, which is equivalent to the standard linearized GP equation, is given to describe the collective excitation of BEC in a natual way. Applications of the new formalism to the homogeneous case emphasize on the zero mode and its relevant ground state of BEC.
Cite
@article{arxiv.quant-ph/0004012,
title = {Elementary Excitations in Trapped BEC and Zero Mode Problem},
author = {D. L. Zhou and X. X. Yi and G. R. Jin and Y. H. Su and Y. X. Liu and C. P. Sun},
journal= {arXiv preprint arXiv:quant-ph/0004012},
year = {2007}
}
Comments
10 pages, no figures