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学术报告:用拉比振荡测量Majorana束缚态
By: beaming, PostTime: 2014/11/27, Visits: 21
题目:用拉比振荡测量Majorana束缚态。
报告人:中山大学理工学院王志博士。
时间:12月2日(周二)下午3:00.
地点: 理6栋4楼会议室。
Viewing Majorana Bound States by Rabi Oscillations
Abstract: We propose to explore Majorana bound states (MBSs) of
topological superconductivity by Rabi oscillation. We design a device
consisting of a quantum dot (QD) and an rf-SQUID with Majorana bound
states at the Josephson junction.
Rabi oscillations between energy levels formed by MBSs are induced by
ac gate voltage controlling the coupling between QD and a MBS, and
measured by detecting the electron occupation on QD. With Floquet
theorem and numerical analysis we reveal that from the ac driving
frequency for resonant Rabi oscillation one can directly map out the
fractional Josephson relation $\cos(\pi\Phi/\Phi_0)$ unique to MBSs,
with $\Phi$ the magnetic flux through SQUID and $\Phi_0=hc/2e$ the
flux quantum. The present scheme is expected to provide a compelling
evidence for MBSs under intensive searching.