Global-fidelity limits of state-dependent cloning of mixed states

Details Global-fidelity limits of state-dependent cloning of mixed states Global-fidelity limits of state-dependent cloning of mixed states

2003-01-24

arxiv.org/abs/quant-ph/0301132v2

Phys. Rev. A 68, 032303 (2003) (6 pages)

Physics

Quantum Physics

8 pages, ReVTeX, 1 figure. In revised form an attainability of presented limits is discussed. Detected errors are corrected. E

Scientific paper

10.1103/PhysRevA.68.032303

By relevant modifications, the known global-fidelity limits of
state-dependent cloning are extended to mixed quantum states. We assume that
the ancilla contains some a priori information about the input state. As it is
shown, the obtained results contribute to the stronger no-cloning theorem. An
attainability of presented limits is discussed.

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