Out-of-equilibrium charge dynamics in a hybrid circuit quantum electrodynamics architecture

J. J. Viennot, M. R. Delbecq, M. C. Dartiailh, A. Cottet, and T. Kontos
Phys. Rev. B 89, 165404 – Published 4 April 2014

Abstract

The recent development of hybrid circuit quantum electrodynamics allows one to study how cavity photons interact with a system driven out of equilibrium by fermionic reservoirs. We study here one of the simplest combination: a double quantum dot coupled to a single mode of the electromagnetic field. We are able to couple resonantly the charge levels of a carbon-nanotube-based double dot to cavity photons. We perform a microwave readout of the charge states of this system, which allows us to unveil features of the out-of-equilibrium charge dynamics, otherwise invisible in the DC current. We extract the relaxation rate, dephasing rate, and photon number of the hybrid system using a theory based on a master equation technique. These findings open the path for manipulating other degrees of freedom, e.g., the spin and/or the valley in nanotube-based double dots using microwave light.

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  • Received 13 December 2013
  • Revised 14 March 2014

DOI:https://doi.org/10.1103/PhysRevB.89.165404

©2014 American Physical Society

Authors & Affiliations

J. J. Viennot, M. R. Delbecq, M. C. Dartiailh, A. Cottet, and T. Kontos*

  • Laboratoire Pierre Aigrain, Ecole Normale Supérieure, CNRS UMR 8551, Laboratoire associé aux universités Pierre et Marie Curie et Denis Diderot, 24, rue Lhomond, 75231 Paris Cedex 05, France

  • *To whom correspondence should be addressed: kontos@lpa.ens.fr

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Vol. 89, Iss. 16 — 15 April 2014

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