Phonon Casimir effect in polyatomic systems
Mesoscale and Nanoscale Physics
2021-06-02 v2 Other Condensed Matter
Abstract
The phonon Casimir effect describes the phonon-mediated interaction between defects in condensed-matter systems. Using the path-integral formalism, we derive a general method for calculating the Helmholtz free energy due to vibrational modes in systems of arbitrary dimensionality and composition. Our results make it possible to extract the defect interaction energy at any temperature for various defect configurations. We demonstrate our approach in action by performing numerical calculations for mono- and diatomic chains, as well as a diatomic molecule, at zero and finite temperatures and validate our results using exact diagonalization.
Cite
@article{arxiv.2012.11082,
title = {Phonon Casimir effect in polyatomic systems},
author = {Gideon Lee and Aleksandr Rodin},
journal= {arXiv preprint arXiv:2012.11082},
year = {2021}
}
Comments
12 pages, 8 figures