Correlated-squeezed-state approach for phonon coupling in a tunneling system
- 1 September 1991
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (10) , 5013-5015
- https://doi.org/10.1103/physrevb.44.5013
Abstract
A variational study of a tunneling particle coupled to phonons is presented. The trial wave function has built in the correlation between different modes and thereby goes beyond earlier variational treatments. This leads to a significant improvement of the energy and therefore a better representation of the ground state. The condition for the localization-delocalization transition of the tunneling particle is modified in the correlated squeezed state compared to previous studies.Keywords
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