Quasiparticle poisoning in trivial and topological Josephson junctions
arXiv:2112.05650 · doi:10.1103/PhysRevB.105.174519
Abstract
We study theoretically a short single-channel Josephson junction between superconductors in the trivial and topological phases. The junction is assumed to be biased by a small current and subjected to quasiparticle poisoning. We find that the presence of quasiparticles leads to a voltage signal from the Josephson junction that can be observed both in the trivial and in the topological phase. Quite remarkably, these voltage signatures are sufficiently different in the two phases such that they can serve as means to clearly distinguish between trivial Andreev and topological Majorana bound states in the system. Moreover, these voltage signatures, in the trivial and topological phase, would allow one to measure directly the quasiparticle poisoning rates and to test various approaches for protection against quasiparticle poisoning.
References in corpus (11)
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
- Majorana qubit decoherence by quasiparticle poisoning
- Number fluctuations of sparse quasiparticles in a superconductor
- Fermion-parity anomaly of the critical supercurrent in the quantum spin-Hall effect
- Majorana splitting from critical currents in Josephson junctions
- Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits
- Fractional ac Josephson effect in unconventional superconductors
- Using materials for quasiparticle engineering
- Degeneracy lifting of Majorana bound states due to electron-phonon interactions