We propose an experimentally feasible scheme to generate nonmaximal entanglement between two atomic ensembles. The degree of entanglement is readily tunable. The scheme involves laser manipulation of atomic ensembles, adjustable quarter- and half-wave plates, beam splitter, polarizing beam splitters, and single-photon detectors, and well fits the status of the current experimental technology. Finally we use the nonmaximally entangled state of ensembles to demonstrate quantum nonlocality by detecting the Clauser-Horne-Shimony-Holt inequality.
@article{arxiv.quant-ph/0207021,
title = {Scheme for preparation of nonmaximal entanglement between two atomic ensembles},
author = {Peng Xue and Guang-Can Guo},
journal= {arXiv preprint arXiv:quant-ph/0207021},
year = {2007}
}