International Journal of Theoretical Physics

, Volume 44, Issue 9, pp 1541–1548 | Cite as

Quantum Cloning of an Unknown Two-Particle Entangled State with Assistance

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Abstract

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 using a (or two) four-particle entangled state(s) as quantum channel(s). 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.

Keywords

quantum cloning two-particle entangled state two-particle projective measurement 
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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Department of PhysicsHuaiyin Teachers CollegeHuaianP.R. China
  2. 2.CCAST (World Laboratory)BeijingP.R. China

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