Journal
PHYSICAL REVIEW B
Volume 92, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.92.134508
Keywords
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Funding
- NSF DMR [1206612]
- ONR [Q00704]
- ARO [W911NF-09-1-0514]
- DFG [SFB 767]
- EU [291784]
- Zukunftskolleg, Konstanz
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1206612] Funding Source: National Science Foundation
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We find the admittance of a topological Josephson junction Y (omega, phi(0), T) as a function of frequency omega, the static phase bias phi(0) applied to the superconducting leads, and temperature T. The dissipative part of Y allows for spectroscopy of the subgap states in the junction. The resonant frequencies omega(M,n) (phi(0)) for transitions involving the Majorana (M) doublet exhibit characteristic kinks in the phi(0) dependence at phi(0) = pi. The kinks, associated with decoupled Majorana states, remain sharp and the corresponding spectroscopic lines are bright at any temperature, as long as the leads are superconducting. The developed theory may help with regard to extracting quantitative information about Majorana states from microwave spectroscopy.
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