Ensemble averages of exponential quadratic phonon operators
- 1 May 1978
- journal article
- Published by IOP Publishing in Journal of Physics A: General Physics
- Vol. 11 (5) , 939-948
- https://doi.org/10.1088/0305-4470/11/5/023
Abstract
Operator disentangling, the evaluation of matrix elements in the coordinate representation, and a matrix technique are all useful for calculating ensemble averages of exponential quadratic phonon operators. Examples are presented using all three techniques, and their respective merits are discussed.Keywords
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