2003/12/31 by Ming Yang, Wei Song, Zhuo-Liang Cao
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.71.012308
published as Phys. Rev. A 71, 012308 (2005) (6 pages) · 6 pages, 3 figures
arxiv created 2005/01/15 · arxiv updated 2009/12/01
An entanglement purification scheme for arbitrary unknown(mixed and pure non-maximally) entangled ionic states is proposed by using linear optical elements. The main advantage of the scheme is that not only two-ion maximally entangled pairs but also four-ion maximally entangled pairs can be extracted from the less entangled pairs. The scheme is within current technology.