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Chinese Physics, 2003, Vol. 12(4): 403-407    DOI: 10.1088/1009-1963/12/4/311
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

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
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
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.
Keywords:  photon-atom interaction      quantum condensation phenomena      optical susceptibility      Bose systems  
Received:  13 August 2002      Revised:  25 December 2002      Accepted manuscript online: 
PACS:  3280  
  0375  
  4250  
  0530J  
Fund: 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)

Cite this article: 

Hu Zheng-Feng (胡正峰), Du Chun-Guang (杜春光), Li Shi-Qun (李师群) Light-induced nonlinear effects on dispersion relation of ultracold Bose gas 2003 Chinese Physics 12 403

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