We find that Bell's inequality can be significantly violated (up to Tsirelson's bound) with two-mode entangled coherent states using only homodyne measurements. This requires Kerr nonlinear interactions for local operations on the entangled coherent states. Our example is a demonstration of Bell-inequality violations using classical measurements. We conclude that entangled coherent states with coherent amplitudes as small as 0.842 are sufficient to produce such violations.
@article{arxiv.quant-ph/0702165,
title = {Violation of Bell's inequality using classical measurements and non-linear local operations},
author = {Magdalena Stobińska and Hyunseok Jeong and Timothy C. Ralph},
journal= {arXiv preprint arXiv:quant-ph/0702165},
year = {2007}
}
Comments
6 pages, 5 figures, to be published in Phys. Rev. A