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


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 (US)
Article number035437
JournalPhysical Review B
Issue number3
StatePublished - Jan 15 2023

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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