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Detection of the relaxation rates of an interacting quantum dot by a capacitively coupled sensor dot

Jens Schulenborg (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; Janine Splettstoesser (Institutionen för mikroteknologi och nanovetenskap, Tillämpad kvantfysik) ; M. Governale ; L.D. Contreras-Pulido
Physical Review B - Condensed Matter and Materials Physics (1098-0121). Vol. 89 (2014), 19, p. 195305.
[Artikel, refereegranskad vetenskaplig]

We present a theoretical study of the detection of the decay time scales for a single-level quantum dot by means of a capacitively coupled sensor dot, which acts as an electrometer. We investigate the measurement back-action on the quantum-dot decay rates and elucidate its mechanism. We explicitly show that the setup can be used to measure the bare quantum-dot relaxation rates by choosing gate pulses that minimize the back-action. Interestingly, we find that besides the charge relaxation rate, also the rate associated to the fermion parity in the dot can be accessed with this setup. © 2014 American Physical Society.



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Denna post skapades 2014-08-08. Senast ändrad 2016-01-12.
CPL Pubid: 201079

 

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