Parity lifetime of bound states in a proximitized semiconductor nanowire
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Parity lifetime of bound states in a proximitized semiconductor nanowire. / Higginbotham, Andrew Patrick; Albrecht, Sven Marian; Kirsanskas, Gediminas; Chang, Willy; Kuemmeth, Ferdinand; Krogstrup, Peter; Jespersen, Thomas Sand; Nygård, Jesper; Flensberg, Karsten; Marcus, Charles M.
I: Nature Physics, Bind 11, Nr. 12, 01.12.2015, s. 1017-1021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Parity lifetime of bound states in a proximitized semiconductor nanowire
AU - Higginbotham, Andrew Patrick
AU - Albrecht, Sven Marian
AU - Kirsanskas, Gediminas
AU - Chang, Willy
AU - Kuemmeth, Ferdinand
AU - Krogstrup, Peter
AU - Jespersen, Thomas Sand
AU - Nygård, Jesper
AU - Flensberg, Karsten
AU - Marcus, Charles M.
N1 - [QDev]
PY - 2015/12/1
Y1 - 2015/12/1
N2 - 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.
AB - 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.
KW - cond-mat.mes-hall
KW - cond-mat.supr-con
U2 - 10.1038/NPHYS3461
DO - 10.1038/NPHYS3461
M3 - Journal article
VL - 11
SP - 1017
EP - 1021
JO - Nature Physics
JF - Nature Physics
SN - 1745-2473
IS - 12
ER -
ID: 130515205