Detection of the relaxation rates of an interacting quantum dot by a   capacitively coupled sensor dot
  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. 
Jens Schulenborg, Janine Splettstoesser, Michele Governale, and L.   Debora Contreras-Pulido
cond-mat.mes-hall