Abstract
We study single-electron quantum dots on a helium surface created by electrodes submerged into the helium. The parameters of the dots are electrostatically controlled. We find the electron energy spectrum and identify relaxation mechanisms. The in-plane confinement significantly slows down electron relaxation. The energy relaxation is due primarily to coupling to phonons in helium. The dephasing is determined by thermally excited ripplons and by the noise from underlying electrodes. The decay rate can be further suppressed by a magnetic field normal to the helium surface. Slow relaxation in combination with control over the energy spectrum make localized electrons appealing as potential qubits of a quantum computer.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physica E: Low-dimensional Systems and Nanostructures
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
