Phonon-induced relaxation of a two-state system in solids
arXiv:cond-mat/0605667 · doi:10.1103/PhysRevB.74.115102
Abstract
We study phonon-induced relaxation of quantum states of a particle (e.g., electron or proton) in a rigid double-well potential in a solid. Relaxation rate due to Raman two-phonon processes have been computed. We show that in a two-state limit, symmetry arguments allow one to express these rates in terms of independently measurable parameters. In general, the two-phonon processes dominate relaxation at higher temperature. Due to parity effect in a biased two-state system, their rate can be controlled by the bias.
5 PR pages, 1 figure
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