中国物理B ›› 2003, Vol. 12 ›› Issue (4): 403-407.doi: 10.1088/1009-1963/12/4/311

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Light-induced nonlinear effects on dispersion relation of ultracold Bose gas

杜春光1, 李师群1, 胡正峰2   

  1. (1)Key Laboratory for Quantum Information and Measurements of Education Ministry, Department of Physics, Tsinghua University, Beijing 100084, China; (2)Key Laboratory for Quantum Information and Measurements of Education Ministry, Department of Physics, Tsinghua University, Beijing 100084, China; Department of Physics, Nanjing Normal University, Nanjing 210097, China
  • 收稿日期:2002-08-13 修回日期:2002-12-25 出版日期:2003-04-16 发布日期:2005-03-16
  • 基金资助:
    Project supported by the National Natural Science Foundation of China(Grant No. 19975027) and the State Key Development Program for Basic Research of China(Grant No. 001CB309308)

Light-induced nonlinear effects on dispersion relation of ultracold Bose gas

Hu Zheng-Feng (胡正峰)ab, Du Chun-Guang (杜春光)a, Li Shi-Qun (李师群)a   

  1. a Key Laboratory for Quantum Information and Measurements of Education Ministry, Department of Physics, Tsinghua University, Beijing 100084, China; b Department of Physics, Nanjing Normal University, Nanjing 210097, China
  • Received:2002-08-13 Revised:2002-12-25 Online:2003-04-16 Published:2005-03-16
  • Supported by:
    Project supported by the National Natural Science Foundation of China(Grant No. 19975027) and the State Key Development Program for Basic Research of China(Grant No. 001CB309308)

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摘要： We have investigated the optical properties of Λ-configuration ultracold dense Bose gas interacting with two laser pulses, which usually result in electromagnetically induced transparency. With the nonrelativistic quantum electrodynamics and taking into account the atomic dipole－dipole interaction and local field effect, we have derived the Maxwell－Bloch equations of the system. The dispersion relation of an ultracold Bose gas has been obtained and the light-induced nonlinear effects have been analysed. The light-induced nonlinear effects are different from the effects induced by two-body collision of Bose－Einstein condensation atoms which have a frequency shift of transparent window.

Abstract: We have investigated the optical properties of $\Lambda$-configuration ultracold dense Bose gas interacting with two laser pulses, which usually result in electromagnetically induced transparency. With the nonrelativistic quantum electrodynamics and taking into account the atomic dipole－dipole interaction and local field effect, we have derived the Maxwell－Bloch equations of the system. The dispersion relation of an ultracold Bose gas has been obtained and the light-induced nonlinear effects have been analysed. The light-induced nonlinear effects are different from the effects induced by two-body collision of Bose－Einstein condensation atoms which have a frequency shift of transparent window.

Key words: photon-atom interaction, quantum condensation phenomena, optical susceptibility, Bose systems

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  • 3280