Singlet-doublet transitions of a quantum dot Josephson junction detected in a transmon circuit

A Bargerbos, M Pita-Vidal, R Žitko, J Ávila, LJ Splitthoff… - PRX Quantum, 2022 - APS
We realize a hybrid superconductor-semiconductor transmon device in which the
Josephson effect is controlled by a gate-defined quantum dot in an In As-Al nanowire …

A perspective on semiconductor-based superconducting qubits

R Aguado - Applied Physics Letters, 2020 - pubs.aip.org
Following the demonstration of semiconductor-based Josephson junctions, which are fully
tunable by electrical means, new routes have been opened for the study of hybrid …

Spectroscopy of spin-split Andreev levels in a quantum dot with superconducting leads

A Bargerbos, M Pita-Vidal, R Žitko, LJ Splitthoff… - Physical review …, 2023 - APS
We use a hybrid superconductor-semiconductor transmon device to perform spectroscopy of
a quantum dot Josephson junction tuned to be in a spin-1/2 ground state with an unpaired …

Magnetic-field-compatible superconducting transmon qubit

A Kringhøj, TW Larsen, O Erlandsson, W Uilhoorn… - Physical Review …, 2021 - APS
We present a hybrid semiconductor-based superconducting qubit device that remains
coherent at magnetic fields up to 1 T. The qubit transition frequency exhibits periodic …

Suppressed charge dispersion via resonant tunneling in a single-channel transmon

A Kringhøj, B Van Heck, TW Larsen, O Erlandsson… - Physical Review Letters, 2020 - APS
We demonstrate strong suppression of charge dispersion in a semiconductor-based
transmon qubit across Josephson resonances associated with a quantum dot in the junction …

Destructive little-parks effect in a full-shell nanowire-based transmon

D Sabonis, O Erlandsson, A Kringhøj, B Van Heck… - Physical Review Letters, 2020 - APS
A semiconductor transmon with an epitaxial Al shell fully surrounding an InAs nanowire core
is investigated in the low EJ/EC regime. Little-Parks oscillations as a function of flux along …

Dynamics of parafermionic states in transport measurements

IE Nielsen, J Schulenborg, R Egger, M Burrello - SciPost Physics, 2023 - scipost.org
Advances in hybrid fractional quantum Hall (FQH)-superconductor platforms pave the way
for realisation of parafermionic modes. We analyse signatures of these non-abelian anyons …

Andreev modes from phase winding in a full-shell nanowire-based transmon

A Kringhøj, GW Winkler, TW Larsen, D Sabonis… - Physical Review Letters, 2021 - APS
We investigate transmon qubits made from semiconductor nanowires with a fully
surrounding superconducting shell. In the regime of reentrant superconductivity associated …

Few-mode to mesoscopic junctions in gatemon qubits

A Danilenko, D Sabonis, GW Winkler, O Erlandsson… - Physical Review B, 2023 - APS
We investigate a semiconductor nanowire-based gatemon qubit with epitaxial Al on two
facets of the nanowire, allowing gate control of wire density. Two segments have the Al …

qubit with one Josephson junction

GL Guo, HB Leng, Y Hu, X Liu - Physical Review B, 2022 - APS
Quantum states are usually fragile, making quantum computation less stable than classical
computation. Quantum correction codes can protect quantum states but need many physical …