Qubits with electrons on liquid helium
摘要
We study dissipation effects for electrons on the surface of liquid helium, which may serve as qubits of a quantum computer. Each electron is localized in a 3D potential well formed by the image potential in helium and the potential from a submicron electrode submerged into helium. We estimate parameters of the confining potential and characterize the electron energy spectrum. Decay of the excited electron state is due to two-ripplon scattering and to scattering by phonons in helium. We identify mechanisms of coupling to phonons and estimate contributions from different scattering mechanisms. Even in the absence of a magnetic field we expect the decay rate to be s. We also calculate the dephasing rate, which is due primarily to ripplon scattering off an electron. This rate is s for typical operation temperatures.
关键词
引用
@article{arxiv.cond-mat/0209511,
title = {Qubits with electrons on liquid helium},
author = {M. I. Dykman and P. M. Platzman and P. Seddighrad},
journal= {arXiv preprint arXiv:cond-mat/0209511},
year = {2009}
}
备注
15 pages, including 7 figures