Parity lifetime of bound states in a proximitized semiconductor nanowire
| Autor: | Higginbotham, A. P., Albrecht, S. M., Kirsanskas, G., Chang, W., Kuemmeth, F., Krogstrup, P., Jespersen, T. S., Nygard, J., Flensberg, K., Marcus, C. M. |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Nature Physics 11, 1017 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/nphys3461 |
| Popis: | Quasiparticle excitations can compromise the performance of superconducting devices, causing high frequency dissipation, decoherence in Josephson qubits, and braiding errors in proposed Majorana-based topological quantum computers. Quasiparticle dynamics have been studied in detail in metallic superconductors but remain relatively unexplored in semiconductor-superconductor structures, which are now being intensely pursued in the context of topological superconductivity. To this end, we introduce a new physical system comprised of a gate-confined semiconductor nanowire with an epitaxially grown superconductor layer, yielding an isolated, proximitized nanowire segment. We identify Andreev-like bound states in the semiconductor via bias spectroscopy, determine the characteristic temperatures and magnetic fields for quasiparticle excitations, and extract a parity lifetime (poisoning time) of the bound state in the semiconductor exceeding 10 ms. Comment: text and supplementary information combined |
| Databáze: | arXiv |
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