Finite-frequency dissipation in a driven Kondo model

Abstract

Using both a resonant level model and the time-dependent Gutzwiller approximation, we study the power dissipation of a localized impurity hybridized with a conduction band when the hybridization is periodically switched on and off. The total dissipated energy is proportional to the Kondo temperature, with a non-trivial frequency dependence. At low frequencies it can be well approximated by the one of a single quench, and is obtainable analitically; at intermediate frequencies it undergoes oscillations; at high frequencies, after reaching its maximum, it quickly drops to zero. This frequency-dependent energy dissipation could be relevant to systems such as irradiated quantum dots, where Kondo can be switched at very high frequencies.

Kondo nanomechanical dissipation in the driven Anderson impurity model

“…A finite frequency modulation of hybridization was subsequently discussed in Ref. [11], confirming that periodic hybridization switching should contribute a Kondo dissipation per cycle by about k B T K , without much further ado.…”