| Universal Quantum Cloning Machines for Two Identical Mixed Qubits |
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| 作者姓名： | 杨帅 赵梅生 刘乃乐 陈增兵 |
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| 作者单位： | Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026 |
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| 摘 要： |
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| 关 键 词： | 量子克隆机器 量子力学 相互作用 混合状态 |
| 收稿时间： | 2007-06-22 |
Universal Quantum Cloning Machines for Two Identical Mixed Qubits |
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| YANG Shuai,ZHAO Mei-Sheng,LIU Nai-Le,CHEN Zeng-Bing.Universal Quantum Cloning Machines for Two Identical Mixed Qubits[J].Chinese Physics Letters,2007,24(11):3048-3050. |
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| Authors: | YANG Shuai ZHAO Mei-Sheng LIU Nai-Le CHEN Zeng-Bing |
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| Institution: | Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026 |
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| Abstract: | We present a series of universal quantum cloning machines for two identical mixed qubits. Every machine is optimal in the sense that it achieves the optimal bound of the single copy shrinking factor. Unlike in the case of pure state cloning, the single copy shrinking factor does not uniquely determine the cloning map in the case of mixed state cloning. |
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| Keywords: | 03 67 Ca 03 65 Ta 89 70 +c |
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