The Bose-Einstein condensation (BEC) of neutral atoms in quantum field theory (QFT) and thermal field theory (TFT) is formulated. An infinitesimal breaking term to control the behaviors of the system in the infrared region is introduced. The Nambu-Goldstone (NG) mode possesses an artificial non-zero energy. The results indicate that the existence of the NG mode effects observable quantities, such as, condensate profile.
|Number of pages||1|
|Journal||Journal of Modern Optics|
|Publication status||Published - 2004 Apr 15|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics