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半导体Ⅱ-类量子阱中法诺态的结构和自发辐射对无粒子数反转光增益过程的作用 被引量:1
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作者 郭长志 陈水莲 +1 位作者 郭九苓 王舒民 《Journal of Semiconductors》 EI CAS CSCD 北大核心 1998年第2期81-91,共11页
从全量子理论出发,进一步系统深入地分析了在Ⅱ-类半导体量子阱中实现无反转增益过程的物理机制,量子阱层导带Γ-能谷和势垒层导带Χ-能谷混合形成的量子相干法诺态的能谱结构,及其对光吸收几率的法诺量子干涉效应,首次探讨了法... 从全量子理论出发,进一步系统深入地分析了在Ⅱ-类半导体量子阱中实现无反转增益过程的物理机制,量子阱层导带Γ-能谷和势垒层导带Χ-能谷混合形成的量子相干法诺态的能谱结构,及其对光吸收几率的法诺量子干涉效应,首次探讨了法诺态的能谱结构和真空场量子起伏引起的自发辐射对受激光增益过程的影响。 展开更多
关键词 半导体量子阱 无反转增益 法诺态 激光器
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PREPARATION OF ENTANGLEMENT STATES IN A TWO-SPIN SYSTEM BY LYAPUNOV-BASED METHOD
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作者 Fei YANG Shuang CONG 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2012年第3期451-462,共12页
A stable Lyapunov-based control law is proposed for entanglement states preparation in this paper. Tbe mathematical model of a two-spin system is constructed in interaction picture. An average value of observable oper... A stable Lyapunov-based control law is proposed for entanglement states preparation in this paper. Tbe mathematical model of a two-spin system is constructed in interaction picture. An average value of observable operator is selected as the Lyapunov fllnction. This paper designs the observable operator to make sure that the target state is stable in Lyapunov sense. Then the authors analyze the convergence of the control system, and demonstrate that the Bell states are asymptotically stable under the control law designed. Compared with other methods, the control method proposed in this paper has the advantages of easy design and convergence to the target states. Numerical simulation experiments for the preparation of Bell states are implemented. 展开更多
关键词 ENTANGLEMENT Lyapunov-based method interaction picture observable operator.
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