Dynamics and control of a qubit in spin environment: an exact master equation study
Quantum Physics
2016-01-28 v1
Abstract
We present an exact master equation for a central spin- system coupled to a spin- bath in terms of hyperfine interaction, which provides a unified formalism for both free evolution and controlled dynamics of the central spin. The equation enables us to study controllability of dynamics processes with various degrees of non-Markovianity. We investigate the Overhauser's effect on decoherence dynamics of the central spin under different bath spectra and the system-bath coupling strengths. Nonperturbative leakage elimination approach is applied to the system to suppress decoherence in solid-state quantum information processing.
Keywords
Cite
@article{arxiv.1601.07197,
title = {Dynamics and control of a qubit in spin environment: an exact master equation study},
author = {Jun Jing and Lian-Ao Wu},
journal= {arXiv preprint arXiv:1601.07197},
year = {2016}
}
Comments
submitted to Phys. Rev. A on Dec 29, 2015