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.
Received: 13 August 2002
Revised: 25 December 2002
Accepted manuscript online:
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
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
