Cluster expansion for the description of condensed state: crystalline cell approach

Cluster expansion for the description of condensed state: crystalline cell approach

A well-known cluster expansion, which leads to virial expansion for the free energy of low density systems, is modified in such a way that it becomes applicable to the description of condensed state of matter. To this end, the averaging of individual clusters over the states of an ideal gas is repla...

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Veröffentlicht in:arXiv.org 2018-12
Hauptverfasser: Bokun, G S, Holovko, M F
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Clusters
Free energy
Ideal gas
Partitions (mathematics)
Physics - Statistical Mechanics
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description A well-known cluster expansion, which leads to virial expansion for the free energy of low density systems, is modified in such a way that it becomes applicable to the description of condensed state of matter. To this end, the averaging of individual clusters over the states of an ideal gas is replaced by the averaging over the states of a non-correlated crystal using single-particle cell potentials. As a result, we arrive at the expansion of the partition function in correlations on the basis of single-particle functions corresponding to the multiplicative approximation. The cell potentials defining these functions are found from the condition of the minimum of the remainder in the constructed decomposition.
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subjects Clusters
Free energy
Ideal gas
Partitions (mathematics)
Physics - Statistical Mechanics
title Cluster expansion for the description of condensed state: crystalline cell approach
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