Comment on "Universal Decoherence in Solids"

Details Comment on "Universal Decoherence in Solids" Comment on "Universal Decoherence in Solids"

2004-10-05

arxiv.org/abs/cond-mat/0410106v1

Phys. Rev. Lett. 93, 158901 (2004)

Physics

Condensed Matter

Disordered Systems and Neural Networks

1 page, no figures

Scientific paper

10.1103/PhysRevLett.93.158901

We discuss the formula for the decoherence rate proposed by Eugene M. Chudnovsky [Phys. Rev. Lett. 92, 120405 (2004)]. We show that it has a limited range of validity and is not applicable to evaluation of the width of a low-energy optical mode considered by Chudnovsky as an example. This is due to unjustified use of the Fermi golden rule for calculation of the relaxation rate. We present more general expression for the probability of the phonon-induced transition.

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