Enhancement of entanglement transfer in a spin chain by phase shift-control
Quantum Physics
2007-07-08 v2
Abstract
We study the effect of a phase shift on the amount of transferrable two-spin entanglement in a spin chain. We consider a ferromagnetic Heisenberg/XY spin chain, both numerically and analytically, and two mechanisms to generate a phase shift, the Aharonov-Casher effect and the Dzyaloshinskii-Moriya interaction. In both cases, the maximum attainable entanglement is shown to be significantly enhanced, suggesting its potential usefulness in quantum information processing.
Cite
@article{arxiv.quant-ph/0610103,
title = {Enhancement of entanglement transfer in a spin chain by phase shift-control},
author = {K. Maruyama and T. Iitaka and F. Nori},
journal= {arXiv preprint arXiv:quant-ph/0610103},
year = {2007}
}
Comments
7 pages, 5 figures. v2: a fig added, the main text modified a bit