Spin decay and quantum parallelism
Mesoscale and Nanoscale Physics
2009-11-07 v2 Quantum Physics
Abstract
We study the time evolution of a single spin coupled inhomogeneously to a spin environment. Such a system is realized by a single electron spin bound in a semiconductor nanostructure and interacting with surrounding nuclear spins. We find striking dependencies on the type of the initial state of the nuclear spin system. Simple product states show a profoundly different behavior than randomly correlated states whose time evolution provides an illustrative example of quantum parallelism and entanglement in a decoherence phenomenon.
Cite
@article{arxiv.cond-mat/0207195,
title = {Spin decay and quantum parallelism},
author = {John Schliemann and Alexander V. Khaetskii and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0207195},
year = {2009}
}
Comments
6 pages, 4 figures included, version to appear in Phys. Rev. B