Spin dynamics in quantum dots on liquid helium

M. I. Dykman, Ofek Asban, Qianfan Chen, Dafei Jin, S. A. Lyon

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Liquid He-4 is free from magnetic defects, making it an ideal substrate for electrons with long-lived spin states. Such states can serve as qubit states. Here we consider the spin states of electrons electrostatically localized in quantum dots on a helium surface. Efficient gate operations in this system require spin-orbit coupling. It can be created by a nonuniform magnetic field from a current-carrying wire, can be turned on and off, and allows one to obtain large electrodipole moment and comparatively fast coupling of spins in neighboring dots. Of central importance is to understand spin decay due to the spin-orbit coupling. We establish the leading mechanism of such decay and show that the decay is sufficiently slow to enable high-fidelity single- and two-qubit gate operations.

Original languageEnglish
Article number035437
JournalPhysical Review B
Volume107
Issue number3
DOIs
StatePublished - 15 Jan 2023
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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