Parity-Controlled 2π Josephson Effect Mediated by Majorana Kramers Pairs
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PhysRevLett.120.267002.pdf
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Author(s)
Schrade, Constantin
Fu, Liang
Date Issued
June 2018
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Schrade, Constantin, and Liang Fu. “Parity-Controlled 2 π Josephson Effect Mediated by Majorana Kramers Pairs.” Physical Review Letters, vol. 120, no. 26, June 2018.
Version
Final published version
Abstract
We study a time-reversal-invariant topological superconductor island hosting spatially separated Majorana Kramers pairs, with weak tunnel couplings to two s-wave superconducting leads. When the topological superconductor island is in the Coulomb blockade regime, we predict that a Josephson current flows between the two leads due to a nonlocal transfer of Cooper pairs mediated by the Majorana Kramers pairs. Interestingly, we find that the sign of the Josephson current is controlled by the joint parity of all four Majorana bound states on the island. Consequently, this parity-controlled Josephson effect can be used for qubit readout in Majorana-based quantum computing.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.120.267002
