Unified Approach to Universal Cloning and Phase-Covariant Cloning

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Hu, Jia-Zhong; Yu, Zong-Wen; Wang, Xiang-Bin;
  • Subject:
    arxiv: Quantum Physics | Quantitative Biology::Cell Behavior

We analyze the problem of approximate quantum cloning when the quantum state is between two latitudes on the Bloch's sphere. We present an analytical formula for the optimized 1-to-2 cloning. The formula unifies the universal quantum cloning (UQCM) and the phase covaria... View more
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