报告题目：Controlling a nanowire spin-orbit qubit via electric-dipole spin resonance

报 告 人：游建强，Beijing Computational Science Research Center

报告时间：2014年6月12日16:00

报告地点：理科楼郑裕彤大讲堂

报告摘要：A semiconductor nanowire quantum dot with strong spin-orbit coupling (SOC) can be used to achieve a spin-orbit qubit. In contrast to a spin qubit, the spin-orbit qubit can respond to an external a.c. electric field, an effect called electric-dipole spin resonance. Here I will show the theoretical results obtained in the strong SOC regime: (i) There is an optimal SOC strength, where the Rabi frequency induced by the a.c. electric field becomes maximal; (ii) both the level spacing and the Rabi frequency of the spin-orbit qubit have periodic responses to the direction of the external static magnetic field. These responses can be used to determine the SOC in the nanowire. Moreover, I will talk about the nanowire double quantum dot with strong SOC and compare the theoretical and experimental results.