中国物理B ›› 2005, Vol. 14 ›› Issue (2): 433-438.doi: 10.1088/1009-1963/14/2/037

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Population transfer and coherence in the adiabatic limit by counterintuitive and intuitive pulse sequences

周艳微1, 叶存云2   

  1. (1)Optics Institute, Zhejiang University, Hangzhou 310027, China; (2)Optics Institute, Zhejiang University, Hangzhou 310027, China; College Lasertek Inc., Houston, TX 77380 USA
  • 收稿日期:2004-08-02 修回日期:2004-10-27 出版日期:2005-03-02 发布日期:2005-03-02
  • 基金资助:
    Project supported by the Major Programme of the National Natural Science Foundation of China (Grant No 10334050) and the Initial Financial Support from Zhejinag University, Zhejiang Province China.

Population transfer and coherence in the adiabatic limit by counterintuitive and intuitive pulse sequences

Zhou Yan-Wei (周艳微)a, Ye Cun-Yun (叶存云)ab   

  1. a Optics Institute, Zhejiang University, Hangzhou 310027, China; b College Lasertek Inc., Houston, TX 77380 USA
  • Received:2004-08-02 Revised:2004-10-27 Online:2005-03-02 Published:2005-03-02
  • Supported by:
    Project supported by the Major Programme of the National Natural Science Foundation of China (Grant No 10334050) and the Initial Financial Support from Zhejinag University, Zhejiang Province China.

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摘要： Two approaches of achieving population transfer and coherence are investigated for the three-level Λ system in the adiabatic limit. The effects of the laser pulse sequence on the population transfer efficiency and coherence are studied. Coherent control of quantum state and population is studied by numerical simulation based on self-consistent set of density matrix equations. It can be seen that the counterintuitive pulse sequence is more efficient in population transfer and coherence than the intuitive one.

关键词: population transfer, quantum coherence, three-level Λ system, adiabatic

Abstract: Two approaches of achieving population transfer and coherence are investigated for the three-level Λ system in the adiabatic limit. The effects of the laser pulse sequence on the population transfer efficiency and coherence are studied. Coherent control of quantum state and population is studied by numerical simulation based on self-consistent set of density matrix equations. It can be seen that the counterintuitive pulse sequence is more efficient in population transfer and coherence than the intuitive one.

Key words: population transfer, quantum coherence, three-level $\Lambda$ system, adiabatic

中图分类号: 

  • 42.50.Ar
32.80.Xx (Level crossing and optical pumping) 97.20.Tr (Population II stars (horizontal branch, metal poor, etc.)) 02.60.Cb (Numerical simulation; solution of equations)