Journal
SCIPOST PHYSICS
Volume 6, Issue 5, Pages -Publisher
SCIPOST FOUNDATION
DOI: 10.21468/SciPostPhys.6.5.055
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Funding
- Aker Scholarship
- Deutsche Forschungsgemeinschaft via the Emmy Noether Programme [ME 4844/1-1, SFB 1143]
- EPSRC [EP/I031014/1, EP/N01930X/1]
- Astor Junior Research Fellowship of New College, Oxford
- EPSRC [EP/I031014/1, EP/N01930X/1, EP/S020527/1] Funding Source: UKRI
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We study Majorana modes bound to vortex cores in a chiral p-wave superconductor at temperatures non-negligible compared to the superconducting gap. Thermal occupation of Caroli de Gennes-Matricon (CdGM) states, below the full gap, causes the free energy difference between the two fermionic parity sectors to decay algebraically with increasing temperature. The power law acquires an additional factor of T-1 for each bound state thermally excited. The zero-temperature result is exponentially recovered well below the minigap (lowest-lying CdGM level). Our results suggest that temperatures larger than the minigap may not be disastrous for topological quantum computation. We discuss the prospect of precision measurements of pinning forces on vortices as a readout scheme for Majorana qubits.
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