Reviewing the ideas developed in , the ground state life time of a finite size atomic Bose Einstein condensate is studied for coherent, squeezed coherent and thermal coherent ground states. Ground state evolution of coherent and squeezed coherent states in a double well potential is studied. Effects of thin spectrum on Bose-Einstein condensates is discussed and quasiparticle excitation lifetimes are calculated. It is shown that the effect of the states we use on the free energy vanishes in the thermodynamic limit. Possible extension to a double well potential and effect of a second broken symmetry is also discussed.
Bibliographical noteFunding Information:
T.B. is supported by TÜBİTAK. O.E.M. acknowledges the support from a TÜBA/GEBİP grant. T.B. acknowledges fruitful discussions with Jasper van Wezel and Patrick Navez.