Controlled Dephasing and Measurement Efficiency via Quantum Dot Detector
Controlled Dephasing and Measurement Efficiency via Quantum Dot Detector
We study the charge detection and controlled dephasing of a mesoscopic system via a quantum dot detector (QDD), in which the mesoscopic system and the QDD are capacitively coupled. The QDD is considered to exhibit coherent resonant tunnelling via a single level. It is found that dephasing rate is proportional …