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A Remark on the Optimal Cloning of An N-Level Quantum System | | Sergio Albeverio
; Shao-Ming Fei
; | | Date: |
8 Dec 1999 | | Journal: | Eur.Phys.J. B14 (2000) 669-672 | | Subject: | quant-ph cond-mat hep-th | | Abstract: | We study quantum cloning machines (QCM) that act on an unknown N-level quantum state and make M copies. We give a formula for the maximum of the fidelity of cloning and exhibit the unitary transformations that realize this optimal fidelity. We also extend the results to treat the case of M copies from $N^prime$ ($M>N^prime$) identical N-level quantum systems. | | Source: | arXiv, quant-ph/9912038 | | Services: | Forum | Review | PDF | Favorites | |
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