SU(2)-path integral investigation of Holstein dimer

Date
2000
Authors
Hakioğlu, A. T.
Ivanov, V. A.
Zhuravlev, M. Ye.
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Source Title
Physica A : Statistical Mechanics and its Applications
Print ISSN
0378-4371
Electronic ISSN
1873-2119
Publisher
Elsevier Science Publishers B.V., Amsterdam, Netherlands
Volume
284
Issue
1-4
Pages
172 - 186
Language
English
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Abstract

The SU(2) coherent state path integral is used to investigate the partition function of the Holstein dimer. This approach naturally takes into account the symmetry of the model. The ground-state energy and the number of the phonons are calculated as functions of the parameters of the Hamiltonian. The renormalizations of the phonon frequency and electron orbital energies are considered. The destruction of quasiclassical mean-field solution is discussed.

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