Detection of the Quantum Capacitance of a Point Contact via Dispersive Gate Sensing
Detection of the Quantum Capacitance of a Point Contact via Dispersive Gate Sensing
The readout technique of dispersive gate sensing (DGS) uses an electrode embedded in a microwave resonator to detect the quantum capacitance of a mesoscopic device arising from single-electron tunneling. Here, we extend DGS from the detection of discrete tunnel events to the open regime, observing jumps in the capacitance of …