Transport signatures of quasiparticle poisoning in a majorana island

S.M. Albrecht, E. Hansen, A.P. Higginbotham, F. Kuemmeth, T. Jespersen, J. Nygård, P. Krogstrup, J. Danon, K. Flensberg, C. Marcus, APS Physics, Physical Review Letters 118 (2017).


Journal Article | Published | English
Author
Albrecht, S M; Hansen, Esben; Higginbotham, Andrew PIST Austria ; Kuemmeth, Ferdinand; Jespersen, Thomas; Nygård, Jesper; Krogstrup, Peter; Danon, Jeroen; Flensberg, Karsten; Marcus, Charles
Abstract
We investigate effects of quasiparticle poisoning in a Majorana island with strong tunnel coupling to normal-metal leads. In addition to the main Coulomb blockade diamonds, "shadow" diamonds appear, shifted by 1e in gate voltage, consistent with transport through an excited (poisoned) state of the island. Comparison to a simple model yields an estimate of parity lifetime for the strongly coupled island (∼1 μs) and sets a bound for a weakly coupled island (>10 μs). Fluctuations in the gate-voltage spacing of Coulomb peaks at high field, reflecting Majorana hybridization, are enhanced by the reduced lever arm at strong coupling. When converted from gate voltage to energy units, fluctuations are consistent with previous measurements.
Publishing Year
Date Published
2017-03-31
Journal Title
APS Physics, Physical Review Letters
Acknowledgement
Research supported by Microsoft, the Danish National Research Foundation, the Lundbeck Foundation, Carlsberg Foundation, Villum Foundation, and the European Commission.
Volume
118
Issue
13
Article Number
137701
IST-REx-ID
103

Cite this

Albrecht SM, Hansen E, Higginbotham AP, et al. Transport signatures of quasiparticle poisoning in a majorana island. APS Physics, Physical Review Letters. 2017;118(13). doi:10.1103/PhysRevLett.118.137701
Albrecht, S. M., Hansen, E., Higginbotham, A. P., Kuemmeth, F., Jespersen, T., Nygård, J., … Marcus, C. (2017). Transport signatures of quasiparticle poisoning in a majorana island. APS Physics, Physical Review Letters. American Physical Society. https://doi.org/10.1103/PhysRevLett.118.137701
Albrecht, S M, Esben Hansen, Andrew P Higginbotham, Ferdinand Kuemmeth, Thomas Jespersen, Jesper Nygård, Peter Krogstrup, Jeroen Danon, Karsten Flensberg, and Charles Marcus. “Transport Signatures of Quasiparticle Poisoning in a Majorana Island.” APS Physics, Physical Review Letters. American Physical Society, 2017. https://doi.org/10.1103/PhysRevLett.118.137701.
S. M. Albrecht et al., “Transport signatures of quasiparticle poisoning in a majorana island,” APS Physics, Physical Review Letters, vol. 118, no. 13. American Physical Society, 2017.
Albrecht SM, Hansen E, Higginbotham AP, Kuemmeth F, Jespersen T, Nygård J, Krogstrup P, Danon J, Flensberg K, Marcus C. 2017. Transport signatures of quasiparticle poisoning in a majorana island. APS Physics, Physical Review Letters. 118(13), 137701.
Albrecht, S. M., et al. “Transport Signatures of Quasiparticle Poisoning in a Majorana Island.” APS Physics, Physical Review Letters, vol. 118, no. 13, 137701, American Physical Society, 2017, doi:10.1103/PhysRevLett.118.137701.
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