Optimal multi-photon entanglement concentration with the photonic Faraday rotation
Abstract
A recent paper (Phys. Rev. A \textbf{86}, 034305 (2012)) proposed an entanglement concentration protocol (ECP) for distilling one pair of maximally entangled multi-photon Greenberger-Horne-Zeilinger (GHZ) state from two pairs of less-entangled multi-photon states with the photonic Faraday rotation. In this paper, we put forward an improved ECP for arbitrary less-entangled multi-photon GHZ state. In the ECP, we only require one pair of less-entangled multi-photon state and one auxiliary photon, and the whole concentration process only requires local operations. Moreover, our ECP can be used repeatedly to further concentrate the less-entangled multi-photon state and obtain a higher success probability. If consider the practical operation and imperfect detection, our protocol is more efficient. This ECP may be useful in current quantum information processing.
Keywords
Cite
@article{arxiv.1211.0351,
title = {Optimal multi-photon entanglement concentration with the photonic Faraday rotation},
author = {Lan Zhou},
journal= {arXiv preprint arXiv:1211.0351},
year = {2012}
}
Comments
9 pages, 4 figures. arXiv admin note: substantial text overlap with arXiv:1210.6178