Operator method for nonperturbative calculation of the thermodynamic values in quantum statistics: diatomic molecular gas
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Publication:4662124
DOI10.1088/0305-4470/37/42/001zbMATH Open1067.82002arXivquant-ph/0309155OpenAlexW3104422012MaRDI QIDQ4662124
Author name not available (Why is that?)
Publication date: 30 March 2005
Published in: Journal of Physics A: Mathematical and General (Search for Journal in Brave)
Abstract: Operator method and cumulant expansion are used for nonperturbative calculation of the partition function and the free energy in quantum statistics. It is shown for Boltzmann diatomic molecular gas with some model intermolecular potentials that the zeroth order approximation of the proposed method interpolates the thermodynamic values with rather good accuracy in the entire range of both the Hamiltonian parameters and temperature. The systematic procedure for calculation of the corrections to the zeroth order approximation is also considered.
Full work available at URL: https://arxiv.org/abs/quant-ph/0309155
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