The entanglement concentration and purification for entangled polarization photon state

Details The entanglement concentration and purification for entangled polarization photon state The entanglement concentration and purification for entangled polarization photon state

2001-11-08

arxiv.org/abs/quant-ph/0111049v1

Physics

Quantum Physics

Scientific paper

We present a concentration and purification scheme for nonmaximally entangled pure and mixed porization entangled state. We firstly show that two distant parties Alice and Bob first start with two shared but less entangled photon pure states to produce a four photon GHZ state, and then perform a 45 polarization measurement onto one of the two photons at each location such that the remaining two photon are projected onto a maximally entangled state. We further show the scheme also can be used to purify a class of mixed polarization-entangled state.

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