Disentangling and broadcasting an entangled state simultaneously by asymmetric cloning

Yafei Yu, Jian Feng, Xiaoqing Zhou, Mingsheng Zhan

Published 2002-10-06Version 1

We construct a quantum machine which, by using asymmetric cloner, deals with disentangling and broadcasting entanglement in a single unitary evolution. The attainable maximum value of the scaling parameter $s$ for disentangling is identical to that obtained in previous works. The fidelity of the cloning state with respect to the input entangled state is state-dependent.