Elementary Excitations in Trapped BEC and Zero Mode Problem

Details Elementary Excitations in Trapped BEC and Zero Mode Problem Elementary Excitations in Trapped BEC and Zero Mode Problem

2000-04-04

arxiv.org/abs/quant-ph/0004012v1

Physics

Quantum Physics

10 pages, no figures

Scientific paper

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.

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