Detection of the relaxation rates of an interacting quantum dot by a capacitively coupled sensor dot
Journal article, 2014
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.
Author
Jens Schulenborg
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
Janine Splettstoesser
Chalmers, Microtechnology and Nanoscience (MC2), Applied Quantum Physics
M. Governale
Victoria University of Wellington
L.D. Contreras-Pulido
JARA - Fundamentals of Future Information Technologies
RWTH Aachen University
University of Ulm
Physical Review B - Condensed Matter and Materials Physics
10980121 (ISSN) 1550235x (eISSN)
Vol. 89 19 195305- 195305Areas of Advance
Nanoscience and Nanotechnology
Subject Categories (SSIF 2011)
Condensed Matter Physics
DOI
10.1103/PhysRevB.89.195305