Scheme for concentration of the unknown GHZ entangled states
Zhang Gang, Yang Ming, Zheng‐Yuan Xue, Zhuo‐Liang Cao · Chinese Physics · 2006
We propose two schemes for concentrating unknown nonmaximally tripartite GHZ entangled states via cavity quantum electrodynamics (QED) techniques. The finial pure states obtained from the two schemes are shared by two or three parties. Our schemes only require large-detuned interaction between two driven atoms and the quantized cavity mode, which is insensitive to both the cavity decay and thermal field, thus the schemes are well within current experimental technology.