Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-07-12
Annals of Physics 326, 1070 (2011)
Physics
Condensed Matter
Quantum Gases
10 pages, 6 figures
Scientific paper
10.1016/j.aop.2010.12.002
The coupled equations which describe the temporal evolution of the Bose-Einstein condensed system are derived in the framework of nonequilibrium Thermo Field Dynamics. The key element is that they are not the naive assemblages of presumable equations, but are the self-consistent ones derived by appropriate renormalization conditions. While the order parameter is time-dependent, an explicit quasiparticle picture is constructed by a time-dependent expansion. Our formulation is valid even for the system with a unstable condensate, and describes the condensate decay caused by the Landau instability as well as by the dynamical one.
Nakamura Yoshifumi
Yamanaka Yasuhiro
No associations
LandOfFree
Unifying treatment of nonequilibrium and unstable dynamics of cold bosonic atom system with time-dependent order parameter in Thermo Filed Dynamics does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Unifying treatment of nonequilibrium and unstable dynamics of cold bosonic atom system with time-dependent order parameter in Thermo Filed Dynamics, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unifying treatment of nonequilibrium and unstable dynamics of cold bosonic atom system with time-dependent order parameter in Thermo Filed Dynamics will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-695665