Non-Fermi-liquid Kondo screening under Rabi driving

Seung Sup B. Lee, Jan Von Delft, Moshe Goldstein

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We investigate a Rabi-Kondo model describing an optically driven two-channel quantum dot device featuring a non-Fermi-liquid Kondo effect. Optically induced Rabi oscillation between the valence and conduction levels of the dot gives rise to a two-stage Kondo effect: Primary screening of the local spin is followed by secondary nonequilibrium screening of the local orbital degree of freedom. Using bosonization arguments and the numerical renormalization group, we compute the dot emission spectrum and residual entropy. Remarkably, both exhibit two-stage Kondo screening with non-Fermi-liquid properties at both stages.

Original languageEnglish
Article number085110
JournalPhysical Review B
Issue number8
StatePublished - 15 Feb 2020


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