Scattering theory of plasmon-assisted entanglement transfer and distillation
Abstract
We analyse the quantum mechanical limits to the plasmon-assisted entanglement transfer observed by E. Altewischer, M.P. van Exter, and J.P. Woerdman [Nature, 418, 304 (2002)]. The maximal violation S of Bell's inequality at the photodetectors behind two linear media (such as the perforated metal films in the experiment) can be described by two ratio's tau_1, tau_2 of polarization-dependent transmission probabilities. A fully entangled incident state is transferred without degradation for tau_1=tau_2, but a relatively large mismatch of tau_1 and tau_2 can be tolerated with a small reduction of S. We predict that fully entangled Bell pairs can be distilled out of partially entangled radiation if tau_1 and tau_2 satisfy a pair of inequalities.
Keywords
Cite
@article{arxiv.quant-ph/0211103,
title = {Scattering theory of plasmon-assisted entanglement transfer and distillation},
author = {J. L. van Velsen and J. Tworzydlo and C. W. J. Beenakker},
journal= {arXiv preprint arXiv:quant-ph/0211103},
year = {2007}
}
Comments
4 pages including 2 figures; two references added, plasmon model included