Title: Coupling a single electron on superfluid helium to a superconducting resonator

Abstract

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 $$$$g/2\pi =4.8\pm 0.3$$$$ $g∕2\pi =4.8\pm 0.3$  MHz, greatly exceeding the resonator linewidth $$$$\kappa /2\pi =0.5$$$$ $\kappa ∕2\pi =0.5$  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.

Authors:

Koolstra, Gerwin ;

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Yang, Ge; Schuster, David I.

Publication Date:

Fri Nov 22 00:00:00 EST 2019

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC)

OSTI Identifier:

1619595

Alternate Identifier(s):

OSTI ID: 1591833

Grant/Contract Number:  

AC02-05CH11231

Resource Type:

Published Article

Journal Name:

Nature Communications

Additional Journal Information:

Journal Name: Nature Communications Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 2041-1723

Publisher:

Nature Publishing Group

Country of Publication:

United Kingdom

Language:

English

Subject:

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; quantum fluids and solids; quantum physics; superconducting devices