Quantum Computing with Majorana Kramers Pairs
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We propose a universal gate set acting on a qubit formed by the degenerate ground states of a Coulomb-blockaded time-reversal invariant topological superconductor island with spatially separated Majorana Kramers pairs: the "Majorana Kramers qubit."All gate operations are implemented by coupling the Majorana Kramers pairs to conventional superconducting leads. Interestingly, in such an all-superconducting device, the energy gap of the leads provides another layer of protection from quasiparticle poisoning independent of the island charging energy. Moreover, the absence of strong magnetic fields - which typically reduce the superconducting gap size of the island - suggests a unique robustness of our qubit to quasiparticle poisoning due to thermal excitations. Consequently, the Majorana Kramers qubit should benefit from prolonged coherence times and may provide an alternative route to a Majorana-based quantum computer.
Original language | English |
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Article number | 227002 |
Journal | Physical Review Letters |
Volume | 129 |
Issue number | 22 |
Number of pages | 6 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 23 Nov 2022 |
Bibliographical note
Publisher Copyright:
© 2022 American Physical Society.
Links
- https://arxiv.org/pdf/1807.06620.pdf
Submitted manuscript
ID: 343341976