| Influence of Intrinsic Decoherence on Entanglement of Superconducting Charge Qubit in a Resonant Cavity |
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| 引用本文： | 刘晓楠 邵彬 邹建. Influence of Intrinsic Decoherence on Entanglement of Superconducting Charge Qubit in a Resonant Cavity[J]. 中国物理快报, 2005, 22(12): 2997-3000 |
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| 作者姓名： | 刘晓楠 邵彬 邹建 |
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| 作者单位： | Department of Physics, Beijing Institute of Technology, Beijing 100081 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 10274024 and 60472021. |
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| 摘 要： |
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| 关 键 词： | 内在脱散 共振腔 光学腔 耦合系统 量子论 |
| 收稿时间： | 2005-07-01 |
| 修稿时间： | 2005-07-01 |
Influence of Intrinsic Decoherence on Entanglement of Superconducting Charge Qubit in a Resonant Cavity |
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| LIU Xiao-Nan, SHAO Bin, ZOU Jian. Influence of Intrinsic Decoherence on Entanglement of Superconducting Charge Qubit in a Resonant Cavity[J]. Chinese Physics Letters, 2005, 22(12): 2997-3000 |
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| Authors: | LIU Xiao-Nan SHAO Bin ZOU Jian |
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| Abstract: | Taking the intrinsic decoherence effect into account, we investigate the entanglement dynamics of a superconducting charge qubit in a single-mode optical cavity. Concurrence, as the measure of entanglement of the coupled field-junction system, is calculated. In comparison, we also consider the entanglement of the system by using the entanglement parameter based on the ratio between mutual entropy and partial Von-Neumann entropy to investigate how the intrinsic decoherence affects the entanglement of the coupling system. Our results show that the evolution of the entanglement parameter has the behaviour similar to the concurrence and it is thus the well measure of entanglement for the mixed state in such a coupling system. |
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