where in the evaluation of the trace the basis with energy and particle number eigenstates was considered. A standard result from statistical mechanics [32] then yields the thermodynamic potential (T; V; ) = kBT lnZG; (246) so that one can rewrite the statistical operator as ̂G = e ( Ĥ+ N̂ : (247) The ensemble average hÔi of any operator Ô is obtained by… (More)

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