Parametric longitudinal coupling between a high-impedance superconducting resonator and a semiconductor quantum dot singlet-triplet spin qubit.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
15 Aug 2022
15 Aug 2022
Historique:
received:
19
07
2021
accepted:
20
07
2022
entrez:
15
8
2022
pubmed:
16
8
2022
medline:
16
8
2022
Statut:
epublish
Résumé
Coupling qubits to a superconducting resonator provides a mechanism to enable long-distance entangling operations in a quantum computer based on spins in semiconducting materials. Here, we demonstrate a controllable spin-photon coupling based on a longitudinal interaction between a spin qubit and a resonator. We show that coupling a singlet-triplet qubit to a high-impedance superconducting resonator can produce the desired longitudinal coupling when the qubit is driven near the resonator's frequency. We measure the energy splitting of the qubit as a function of the drive amplitude and frequency of a microwave signal applied near the resonator antinode, revealing pronounced effects close to the resonator frequency due to longitudinal coupling. By tuning the amplitude of the drive, we reach a regime with longitudinal coupling exceeding 1 MHz. This mechanism for qubit-resonator coupling represents a stepping stone towards producing high-fidelity two-qubit gates mediated by a superconducting resonator.
Identifiants
pubmed: 35970821
doi: 10.1038/s41467-022-32236-w
pii: 10.1038/s41467-022-32236-w
pmc: PMC9378792
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
4773Subventions
Organisme : Gordon and Betty Moore Foundation (Gordon E. and Betty I. Moore Foundation)
ID : GBMF 9468
Informations de copyright
© 2022. The Author(s).
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