Tamás Kalmár

Budapest University of Technology and Economics
Title of Poster
Capacitive gate-reflectometry readout of InAs quantum dots
Abstract Regular

Radio-frequency reflectometry enables fast and scalable readout of quantum circuits. We present a gate-reflectometry readout carried out on a quantum dot, where the resonator is coupled to a plunger gate of the device. The quantum dot was defined electrostatically, using an array of bottom gates. In order to increase the sensitivity we utilized advanced an resonator topology with a superconducting inductor. From the phase of the reflected signal a capacitance change of around 60 aF was extracted between the Coulomb-blockaded and conducting state of the device.

Poster Session