Broadcasting of Inseparability

Details Broadcasting of Inseparability Broadcasting of Inseparability

2006-01-27

arxiv.org/abs/quant-ph/0601181v2

J. Phys. A: Math. Gen. 39 No 26 8439-8449 (2006)

Physics

Quantum Physics

13 pages, 2 tables, Accepted in Journal of Physics A

Scientific paper

10.1088/0305-4470/39/26/011

Suppose we are given an entangled pair and then one can ask how well we can produce two entangled pairs starting from a given entangled pair using only local operations. To give response of the above asked question, we study broadcasting of entanglement using state dependent quantum cloning machine as a local copier. We show that the length of the interval for probability-amplitude-squared for broadcasting of entanglement using state dependent cloner can be made larger than the length of the interval for probability-amplitude-squared for broadcasting entanglement using state independent cloner. Further we show that there exists local state dependent cloner which gives better quality copy (in terms of average fidelity) of an entangled pair than the local universal cloner.

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