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Viewing Majorana Bound States by Rabi Oscillations.

Zhi Wang1, Qi-Feng Liang2, Dao-Xin Yao3

  • 11] 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.

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Summary
This summary is machine-generated.

This study uses Rabi oscillations to detect fractional Josephson relations (FJR) from Majorana bound states (MBSs) in topological superconductors. The technique offers a clear signature for MBSs, aiding their intensive search.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Computing
  • Topological Superconductors

Background:

  • Majorana bound states (MBSs) are exotic quasiparticles with potential applications in topological quantum computing.
  • Detecting MBSs in one-dimensional topological superconductors remains a significant experimental challenge.

Purpose of the Study:

  • To propose a novel method for detecting fractional Josephson relations (FJR) as a signature of MBSs.
  • To utilize Rabi oscillations as a sensitive probe for MBSs.

Main Methods:

  • A system combining a quantum dot (QD) and an rf-SQUID with MBSs in the Josephson junction is proposed.
  • Rabi oscillations are induced via ac gate voltage, coupling the QD to MBSs.
  • Floquet theorem and numerical analysis are employed to interpret the results.

Main Results:

  • Electron occupation on the QD oscillates in time, measurable by charge sensing techniques.
  • The resonant driving frequency for coherent Rabi oscillation directly maps the FJR, cos(πΦ/Φ0).
  • This provides a distinct signature for the presence of MBSs.

Conclusions:

  • The proposed scheme offers a clear and direct method for identifying MBSs.
  • This technique is expected to significantly advance the search for MBSs in topological superconductors.