Lower bound on the relative error of mixed-state cloning and related operations

Details Lower bound on the relative error of mixed-state cloning and related operations Lower bound on the relative error of mixed-state cloning and related operations

2002-08-27

arxiv.org/abs/quant-ph/0208159v2

Physics

Quantum Physics

5 pages, ReVTeX, no figures. The main result is completed. The bibliography is extended and corrected. More explanations

Scientific paper

10.1088/1464-4266/5/6/017

We extend the concept of the relative error to mixed-state cloning and
related physical operations, in which the ancilla contains some a priori
information about the input state. The lower bound on the relative error is
obtained. It is shown that this result contributes to the stronger no-cloning
theorem.

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