Out of equilibrium charge dynamics in a hybrid cQED architecture
arXiv:1310.4363 · doi:10.1103/PhysRevB.89.165404
Abstract
The recent development of hybrid cQED 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 read out 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 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.
added new data on two tone microwave spectroscopy of the double dot
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