Resilience of multi-photon entanglement under losses
Quantum Physics
2009-11-10 v3
Abstract
We analyze the resilience under photon loss of the bi-partite entanglement present in multi-photon states produced by parametric down-conversion. The quantification of the entanglement is made possible by a symmetry of the states that persists even under polarization-independent losses. We examine the approach of the states to the set of states with a positive partial transpose as losses increase, and calculate the relative entropy of entanglement. We find that some bi-partite distillable entanglement persists for arbitrarily high losses.
Keywords
Cite
@article{arxiv.quant-ph/0402053,
title = {Resilience of multi-photon entanglement under losses},
author = {G. A. Durkin and C. Simon and J. Eisert and D. Bouwmeester},
journal= {arXiv preprint arXiv:quant-ph/0402053},
year = {2009}
}
Comments
5 pages, 3 figures, title changed, minor typographic errors corrected