2006•Journal of Physics G Nuclear and Particle PhysicsOpen access
Quantum gases in the grand microcanonical ensemble near the thermodynamic limit
Viktor Begun, M. I. Gorenstein, A. Kostyuk, O. S. Zozulya
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Abstract
A new method is proposed for a treatment of ideal quantum gases in the grand microcanonical ensemble near the thermodynamic limit. The method allows rigorous asymptotic calculations of the average number of particles and particle number fluctuations in the system with exactly fixed total energy. It also gives the finite-volume corrections for the total average number of particles and for higher moments of the particle number distribution in a grand microcanonical system approaching the thermodynamic limit. The present consideration confirms our previous findings that the scaled variance for particle number fluctuations in the grand microcanonical ensemble is different from that in the grand canonical ensemble even in the thermodynamic limit.
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