| 脉冲宽度对绝热演化下制备纠缠态的影响 |
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| 引用本文： | 涂杰,胡连.脉冲宽度对绝热演化下制备纠缠态的影响[J].量子电子学报,2010,27(3):300-307. |
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| 作者姓名： | 涂杰 胡连 |
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| 作者单位： | 1 吉林大学珠海学院 广东珠海 519041; 2 华南师范大学物理与电信工程学院 广东广州 510006 |
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| 摘 要： | 精确解旋转磁场作用下的两自旋1/2粒子体系，提出了脉冲宽度是影响态制备的一个非常重要的因素。从能级演化图形与几率跃迁图形上对应地进行了比较分析，脉冲宽度会决定施加点附近能级简并处的态是否发生交换; 与R.G.Unanyan的计算结果相比较，发现绝热条件是否严格满足已经不那么重要，他们给出的绝热条件不是一个很好的判据。
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| 关 键 词： | 量子光学∣脉冲宽度∣精确解∣绝热条件∣纠缠态 |
| 收稿时间： | 2009-11-09 |
| 修稿时间： | 2010-01-11 |
Effect of pulse bandwidth to preparation of entangled states by adiabatic passage |
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| TU Jie,HU Lian.Effect of pulse bandwidth to preparation of entangled states by adiabatic passage[J].Chinese Journal of Quantum Electronics,2010,27(3):300-307. |
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| Authors: | TU Jie HU Lian |
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| Affiliation: | 1 Zhuhai College Jilin University, Zhuhai, 519041, China;
2 Dept. of Physics, South China Normal University, Guangzhou, 510006, China |
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| Abstract: | The exact solution of Schr?dinger equation for two spin-1/2 particles under the rotating magnetic field is obtained. Pulse bandwidth, as a crucial factor in population transfer, is proposed. We analysed the figures of energy and population, concluded that bandwidth of pulse decides if there is an exchange between states at the places of energy degeneracy. Comparing our result with R.G.Unanyan’s, it is found that whether the adiabatic condition is satisfied exactly or not is not so important, and the adiabatic condition that they derived may not be a reliable criterion for preparing entangled states. |
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| Keywords: | quantum optics∣pulse bandwidth∣exact solution∣adiabatic condition∣ entangled states |
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