Semiconductor quantum dots have attracted wide interest for the potential realization of quantum computation. To realize efficient quantum computation, fast manipulation and the corresponding readout are necessary. In...Semiconductor quantum dots have attracted wide interest for the potential realization of quantum computation. To realize efficient quantum computation, fast manipulation and the corresponding readout are necessary. In the past few decades, considerable progress of quantum manipulation has been achieved experimentally. To meet the requirements of high-speed readout, radio-frequency （RF） measurement has been developed in recent years, such as RF-QPC （radio-frequency quantum point contact） and RF-DGS （radio-frequency dispersive gate sensor）. Here we specifically demonstrate the principle of the radio-frequency reflectometry, then review the development and applications of RF measurement, which provides a feasible way to achieve high-bandwidth readout in quantum coherent control and also enriches the methods to study these artificial mesoscopic quantum systems. Finally, we prospect the future usage of radio-frequency reflectometry in scaling-up of the quantum computing models.展开更多
基金supported by the National Key Research&Development Program(Grant No.2016YFA0301700)the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB01030000)+1 种基金the National Natural Science Foundation of China(Grant Nos.11674300,11575172,61674132,and 91421303)the Fundamental Research Fund for the Central Universities
文摘Semiconductor quantum dots have attracted wide interest for the potential realization of quantum computation. To realize efficient quantum computation, fast manipulation and the corresponding readout are necessary. In the past few decades, considerable progress of quantum manipulation has been achieved experimentally. To meet the requirements of high-speed readout, radio-frequency （RF） measurement has been developed in recent years, such as RF-QPC （radio-frequency quantum point contact） and RF-DGS （radio-frequency dispersive gate sensor）. Here we specifically demonstrate the principle of the radio-frequency reflectometry, then review the development and applications of RF measurement, which provides a feasible way to achieve high-bandwidth readout in quantum coherent control and also enriches the methods to study these artificial mesoscopic quantum systems. Finally, we prospect the future usage of radio-frequency reflectometry in scaling-up of the quantum computing models.
