Assisted cloning of an unknown two-particle entangled state

作者：Zhan YB^*

来源：Physics Letters A, 2005, 336(4-5): 317-323.

DOI：10.1016/j.physleta.2004.12.073

• quantum cloning
• two-particle entangled state
• two-particle projective measurement
• unitary transformation

We propose a protocol where one can realize quantum cloning of an unknown two-particle entangled state and its orthogonal complement state with assistance offered by a state preparer. The first stage of the protocol requires usual teleportation via two entangled particle pairs as quantum channel. In the second stage of the protocol, with the assistance (through a two-particle projective measurement) of the preparer, the perfect copies and complement copies of an unknown state can be produced. We also put forward a scheme for the teleportation by using non-maximally entangled quantum channel. The clones and complement clones of unknown state can be obtained with certain probability in the latter scheme.

• 出版日期2005-3-14
• 单位淮阴师范学院