Quantifying entanglement in "Experimental entanglement of four particles"
arXiv:quant-ph/0311031 · doi:10.1016/j.physleta.2004.01.047
Abstract
We quantify various possible entanglement measures for the four particles GHZ entangled state that has been produced experimentally [C. Sackett et al, Nature 404, 256-259 (2000)].
Latex style, 5 pages, nofigures. This paper was written around April 2000 soon after the experimental production of four-ionic GHZ state