title: Viewing Majorana Bound States by Rabi Oscillations.
abstract: We propose to use Rabi oscillation as a probe to view the fractional Josepshon relation (FJR) associated with Majorana bound states (MBSs) expected in one-dimensional topological superconductors. The system consists of a quantum dot (QD) and an rf-SQUID with MBSs at the Josephson junction. Rabi oscillations between energy levels formed by MBSs are induced by ac gate voltage controlling the coupling between QD and MBS when the photon energy proportional to the ac frequency matches gap between quantum levels formed by MBSs and QD. As a manifestation of the Rabi oscillation in the whole system involving MBSs, the electron occupation on QD oscillates with time, which can be measured by charge sensing techniques. With Floquet theorem and numerical analysis we reveal that from the resonant driving frequency for coherent Rabi oscillation one can directly map out the FJR cos(πΦ/Φ0) as a signature of MBSs, with Φ the magnetic flux through SQUID and Φ0 = hc/2e the flux quantum. The present scheme is expected to provide a clear evidence for MBSs under intensive searching.
authors.affiliation: 1] School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China [2] International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba 305-0044, Japan.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Wang
authors.affiliation: 1] International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba 305-0044, Japan [2] Department of Physics, Shaoxing University, Shaoxing 312000, China.
authors.forename: Qi-Feng
authors.initials: QF
authors.lastname: Liang
authors.affiliation: School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Dao-Xin
authors.initials: DX
authors.lastname: Yao
authors.affiliation: International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, Tsukuba 305-0044, Japan.
authors.forename: Xiao
authors.initials: X
authors.lastname: Hu