Destructive Little-Parks Effect in a Full-Shell Nanowire-Based Transmon
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Destructive Little-Parks Effect in a Full-Shell Nanowire-Based Transmon. / Sabonis, Deividas; Erlandsson, Oscar; Kringhoj, Anders; van Heck, Bernard; Larsen, Thorvald W.; Petkovic, Ivana; Krogstrup, Peter; Petersson, Karl D.; Marcus, Charles M.
I: Physical Review Letters, Bind 125, Nr. 15, 156804, 09.10.2020.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Destructive Little-Parks Effect in a Full-Shell Nanowire-Based Transmon
AU - Sabonis, Deividas
AU - Erlandsson, Oscar
AU - Kringhoj, Anders
AU - van Heck, Bernard
AU - Larsen, Thorvald W.
AU - Petkovic, Ivana
AU - Krogstrup, Peter
AU - Petersson, Karl D.
AU - Marcus, Charles M.
PY - 2020/10/9
Y1 - 2020/10/9
N2 - A semiconductor transmon with an epitaxial Al shell fully surrounding an InAs nanowire core is investigated in the low E-J/E-C regime. Little-Parks oscillations as a function of flux along the hybrid wire axis are destructive, creating lobes of reentrant superconductivity separated by a metallic state at a half quantum of applied flux. In the first lobe, phase winding around the shell can induce topological superconductivity in the core. Coherent qubit operation is observed in both the zeroth and first lobes. Splitting of parity bands by coherent single-electron coupling across the junction is not resolved beyond line broadening, placing a bound on Majorana coupling, E-M/h <10 MHz, much smaller than the Josephson coupling E-J/h similar to 4.7 GHz.
AB - A semiconductor transmon with an epitaxial Al shell fully surrounding an InAs nanowire core is investigated in the low E-J/E-C regime. Little-Parks oscillations as a function of flux along the hybrid wire axis are destructive, creating lobes of reentrant superconductivity separated by a metallic state at a half quantum of applied flux. In the first lobe, phase winding around the shell can induce topological superconductivity in the core. Coherent qubit operation is observed in both the zeroth and first lobes. Splitting of parity bands by coherent single-electron coupling across the junction is not resolved beyond line broadening, placing a bound on Majorana coupling, E-M/h <10 MHz, much smaller than the Josephson coupling E-J/h similar to 4.7 GHz.
U2 - 10.1103/PhysRevLett.125.156804
DO - 10.1103/PhysRevLett.125.156804
M3 - Journal article
C2 - 33095630
VL - 125
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
M1 - 156804
ER -
ID: 250545361