Tunnel spectroscopy in ac-driven quantum dot nanoresonators

Details Tunnel spectroscopy in ac-driven quantum dot nanoresonators Tunnel spectroscopy in ac-driven quantum dot nanoresonators

2008-05-18

arxiv.org/abs/0805.2716v1

APPLIED PHYSICS LETTERS 92, 192102 (2008)

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1063/1.2919797

Electronic transport in a triple quantum dot shuttle device in the presence of an ac field is analyzed within a fully quantum mechanical framework. A generalized density matrix formalism is used to describe the time evolution for electronic state occupations in a dissipative phonon bath. In the presence of an ac gate voltage, the electronic states are dressed by photons and the interplay between photon and vibrational sidebands produces current characteristics that obey selection rules. Varying the ac parameters allows to tune the tunneling current features. In particular, we show that coherent destruction of tunneling can be achieved in our device.

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