| 费米超流气体的非线性Rosen-Zener隧穿 |
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| 引用本文： | 蒙红娟,杨阳,王文元,祁鹏堂,马云云,马莹,王善进,段文山.费米超流气体的非线性Rosen-Zener隧穿[J].物理学报,2012,61(6):60303-060303. |
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| 作者姓名： | 蒙红娟 杨阳 王文元 祁鹏堂 马云云 马莹 王善进 段文山 |
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| 作者单位： | 西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070;西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070;西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070;西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070;西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070;西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070;东莞理工学院电子工程学院, 东莞 523808;西北师范大学物理与电子工程学院, 甘肃省原子分子物理与功能材料重点实验室, 兰州 730070 |
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| 基金项目： | 国家自然科学基金(批准号:10725521,91021021,10875098)、国家重点基础研究发展计划(批准号:2007CB814800,2011CB921503)和西北师范大学自然科学基金(批准号:NWNU-KJCXGC-03-48)资助的课题． |
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| 摘 要： | 以非线性Rosen-Zener隧穿理论为基础, 用平均场近似的方法, 通过考虑高阶非线性项的影响, 研究了非线性两能级系统中费米超流气体的Rosen-Zener隧穿现象. 研究发现粒子间的非线性相互作用能够显著地影响量子隧穿. 分别在快扫描极限和绝热极限的条件下, 解释了Rosen-Zener隧穿现象, 并给出了矩形振荡周期与非线性参数之间的依赖关系. 这为更深入认识费米气体的基本属性提供了理论基础.
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| 关 键 词： | 费米超流气体 Rosen-Zener隧穿 |
| 收稿时间： | 2011-05-23 |
| 修稿时间： | 7/9/2011 12:00:00 AM |
Nonlinear Rosen-Zener transition of Fermi superfluid gases |
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| Meng Hong-Juan,Yang Yang,Wang Wen-Yuan,Qi Peng-Tang,Ma Yun-Yun,Ma Ying,Wang Shan-Jin and Duan Wen-Shan.Nonlinear Rosen-Zener transition of Fermi superfluid gases[J].Acta Physica Sinica,2012,61(6):60303-060303. |
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| Authors: | Meng Hong-Juan Yang Yang Wang Wen-Yuan Qi Peng-Tang Ma Yun-Yun Ma Ying Wang Shan-Jin and Duan Wen-Shan |
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| Institution: | Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China;;Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China;;Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China;;Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China;;Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China;;Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China;;School of Electronic Engineering, Dongguan University of Technology, Dongguan 523808 China;Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronic Engineering,
Northwest Normal University, Lanzhou 730070, China; |
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| Abstract: | By considering the contribution of the higher order term representing the lowest approximation of beyond mean field correction and taking Roser-Zener tunneling as the underling process, we study the nonlinear Rosen-Zener transition of Fermi superfluid gas in a two-level system. We find that the nonlinearity can affect the quantun trasition in the fast scan limit and the adiabatic limit. We also derive the analytical expression for the of rectangular oscillation period dependent on nonlinear parameter. This provides a theoretical basis for a deeper understanding of the basis properties of Fermi gases. |
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| Keywords: | Fermi superfluid gases Rosen-Zener transition |
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