Microscopic Evolution of a Weakly Interacting Homogeneous Bose Gas

Details Microscopic Evolution of a Weakly Interacting Homogeneous Bose Gas Microscopic Evolution of a Weakly Interacting Homogeneous Bose Gas

2001-04-24

arxiv.org/abs/cond-mat/0104463v2

Laser Phys. 12 (2002) 43-49

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 1 figure (uses epsfig). To appear in Laser Physics (2001), Special Issue on Bose-Einstein Condensation of Trapped Ato

Scientific paper

We provide a detailed description of the nonequilibrium time evolution of an interacting homogeneous Bose-Einstein condensate. We use a nonperturbative in-medium quantum field theory approach as a microscopic model for the Bose gas. The real-time dynamics of the condensate is encoded in a set of self-consistent equations which corresponds to an infinite sum of ladder Feynman diagrams. The crucial role played by the interaction between fluctuations for the instability generation is thoroughly described.

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