The peculiarities of Bose-condensation of quasiparticles

Details The peculiarities of Bose-condensation of quasiparticles The peculiarities of Bose-condensation of quasiparticles

2009-01-16

arxiv.org/abs/0901.2553v1

Physics

Condensed Matter

Statistical Mechanics

10 pages

Scientific paper

An attempt is made to consider the difference between the proccesses of the Bose-Einstein condensation of particles and quasiparticles. An equation for particle number of the Bose-condensate as a function of the total number of particles in the system is obtained. This equation is also written for the caseof quasiparticles with taking into account their creation by pumping and the existence ofequilibriumthermal excitations in the system. From the analysis of both these equations the chemical potential of pumped quasiparticles and their number in the condensate as a function of pumping intensity is found. It is shown that for low energy quasiparticles the proccess of Bose-condensation begins and proceeds at arbitrary temperatures high enough included.

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