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Coupling a single electron on superfluid helium to a superconducting resonator.

ABSTRACT: Electrons on helium form a unique two-dimensional system on the interface of liquid helium and vacuum. A small number of trapped electrons on helium exhibits strong interactions in the absence of disorder, and can be used as a qubit. Trapped electrons typically have orbital frequencies in the microwave regime and can therefore be integrated with circuit quantum electrodynamics (cQED), which studies light-matter interactions using microwave photons. Here, we experimentally realize a cQED platform with the orbitals of single electrons on helium. We deterministically trap one to four electrons in a dot integrated with a microwave resonator, allowing us to study the electrons' response to microwaves. Furthermore, we find a single-electron-photon coupling strength of [Formula: see text]?MHz, greatly exceeding the resonator linewidth [Formula: see text]?MHz. These results pave the way towards microwave studies of Wigner molecules and coherent control of the orbital and spin state of a single electron on helium.

SUBMITTER: Koolstra G

PROVIDER: S-EPMC6874564 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Coupling a single electron on superfluid helium to a superconducting resonator.

Koolstra Gerwin G Yang Ge G Schuster David I DI

Nature communications 20191122 1

Electrons on helium form a unique two-dimensional system on the interface of liquid helium and vacuum. A small number of trapped electrons on helium exhibits strong interactions in the absence of disorder, and can be used as a qubit. Trapped electrons typically have orbital frequencies in the microwave regime and can therefore be integrated with circuit quantum electrodynamics (cQED), which studies light-matter interactions using microwave photons. Here, we experimentally realize a cQED platform ...[more]

PMID: 31757947

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