Universal distortion-free entanglement concentration
Keiji Matsumoto, Masahito Hayashi · Physical Review A · 2007
We propose a new protocol of universal entanglement concentration, which converts many copies of an unknown pure state to an exact maximally entangled state. The yield of the protocol, which is outputted as a classical information, is probabilistic, and achieves the entropy rate with high probability, just as nonuniversal entanglement concentration protocols do.