Semi-classical model for the dephasing of a two-electron spin qubit coupled to a coherently evolving nuclear spin bath
Mesoscale and Nanoscale Physics
2011-09-07 v2
Abstract
We study electron spin decoherence in a two-electron double quantum dot due to the hyperfine interaction, under spin-echo conditions as studied in recent experiments. We develop a semi-classical model for the interaction between the electron and nuclear spins, in which the time-dependent Overhauser fields induced by the nuclear spins are treated as classical vector variables. Comparison of the model with experimentally-obtained echo signals allows us to quantify the contributions of various processes such as coherent Larmor precession and spin diffusion to the nuclear spin evolution.
Keywords
Cite
@article{arxiv.1103.4862,
title = {Semi-classical model for the dephasing of a two-electron spin qubit coupled to a coherently evolving nuclear spin bath},
author = {Izhar Neder and Mark S. Rudner and Hendrik Bluhm and Sandra Foletti and Bertrand I. Halperin and Amir Yacoby},
journal= {arXiv preprint arXiv:1103.4862},
year = {2011}
}
Comments
14 Pages, some equations were corrected; Published July 27, 2011