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

作者：Schulenborg Jens^*; Splettstoesser Janine; Governale Michele; Contreras Pulido L Debora

来源：Physical Review B, 2014, 89(19): 195305.

DOI：10.1103/PhysRevB.89.195305

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.

• 出版日期2014-5-16