Entanglement Transfer Through an Antiferromagnetic Spin Chain
Abstract
We study the possibility of using an uniformly coupled finite antiferromagnetic spin-1/2 Heisenberg chain as a channel for transmitting entanglement. One member of a pair of maximally entangled spins is initially appended to one end of a chain in its ground state and the dynamical propagation of this entanglement to the other end is calculated. We show that compared to the analogous scheme with a ferromagnetic chain in its ground state, here the entanglement is transmitted faster, with less decay, with a much higher purity and as a narrow pulse form rising non-analytically from zero. Here non-zero temperatures and depolarizing environments are both found to be less destructive in comparison to the ferromagnetic case. The entanglement is found to propagate through the chain in a peculiar fashion whereby it hops to skip alternate sites.
Cite
@article{arxiv.0706.4176,
title = {Entanglement Transfer Through an Antiferromagnetic Spin Chain},
author = {Abolfazl Bayat and Sugato Bose},
journal= {arXiv preprint arXiv:0706.4176},
year = {2010}
}