The preparation of pseudo-pure states plays a central role in the implementation of quantum information processing in high temperature ensemble systems, such as nuclear magnetic resonance. Here we describe a simple approach based on controlled-transfer gates which permits pseudo-pure states to be prepared efficiently using spatial averaging techniques.
@article{arxiv.1003.2065,
title = {Preparing pseudo-pure states with controlled-transfer gates},
author = {Minaru Kawamura and Benjamin Rowland and Jonathan A. Jones},
journal= {arXiv preprint arXiv:1003.2065},
year = {2010}
}
Comments
Significantly revised and extended: now 7 pages including 3 figures; Phys. Rev. A (in press)