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.