Remote Preparation of an Entangled State in Nonideal Conditions |
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Authors: | CHEN Ai-Xi DENG Li LI Jia-Hua ZHAN Zhi-Ming |
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Affiliation: | Department of Physics, East China Jiaotong University, Nanchang 330013, China;Center of Cold Atom Physics, the Chinese Academy of Sciences,Wuhan 430071,China Department of Physics, East China Jiaotong University, Nanchang 330013, China Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China Department of Physics, Jianghan University, Wuhan 430056, China |
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Abstract: | In this paper, the theoretical investigation of remote preparation of an entangled state is studied in nonideal conditions. Our studies include two parts. In the first part, we consider the remote state preparation (RSP) of an entangled state through two equally noisy quantum channel states, namely, a mixture of Bell states. Studies show there is a particular mixed-state channel for which all pure entangled states remain entangled after this inexact RSP. In the second part, we suppose that noises which quantum channels suffer from can be expressed as the Lindblad operators.The master equation of the system can be expressed in the Lindblad form. Through solving the master equation, we calculate the fidelity as a function of decoherence rates and parameters of the state to be prepared. For a given entangled state, we investigate the influenceof different types of noises on the fidelity. |
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Keywords: | remote state preparation fidelity entanglement |
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