Dissipation due to two-level systems in nano-mechanical devices

Abstract

We analyze the dissipation of the frequency vibrations of nano-mechanical devices. We show that the coupling between flexural modes and two-level systems leads to sub-ohmic dissipation. The inverse quality factor of the low energy vibrations depends on temperature as $Q^{-1}(T)\approx Q_0+C{T}^{1/3}$, providing a quantitative description of the experimental data.

6 pages, 4 figures, published version

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