Dephasing Rate in Dielectric Glasses at Ultralow Temperatures
- 30 March 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 80 (13) , 2945-2948
- https://doi.org/10.1103/physrevlett.80.2945
Abstract
A novel mechanism for dephasing in dielectric glasses is considered. The mechanism is due to the delocalized collective excitations arising in the ensemble of the interacting two-level systems. The spectral diffusion induced by these excitations gives rise to the phonon-independent transverse relaxation. The mechanism results in the linear temperature dependence of the dephasing rate and becomes predominant at ultralow temperatures. A qualitative agreement with the experimental data is found.Keywords
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