Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Observation of the red-blue detuning asymmetry in matter-wave superradiance



Lu Deng, Edward W. Hagley, Qiang Cao, Xiaorui Wang, Xinyu Luo, Ruquan Wang, Fan Yang, Xiaoji Zhou, Xuzong Chen, M. G. Payne, Mingsheng Zhan


We show the first experimental observations of matter-wave superradiance using blue-detuned light, and demonstrate a pump-laser detuning asymmetry in the collective atomic recoil motion. In contrast to all previous theoretical treatments, which predict that the process should be symmetric with respect to the sign of the pump laser detuning, we find that for sufficiently high atomic densities the symmetry is broken. However, in the limit of a dilute atomic gas the symmetry is restored. With high atomic densities and a red-detuned pump laser, the usual distinctive multi-order matterwave scattering pattern is clearly visible, whereas with blue-detuned light the collective atom recoil motion is strongly suppressed.
Physical Review Letters


Bose-Einstein condensation, detuning assymetry, matter-waves, superradiance


Deng, L. , Hagley, E. , Cao, Q. , Wang, X. , Luo, X. , Wang, R. , Yang, F. , Zhou, X. , Chen, X. , , M. and Zhan, M. (2010), Observation of the red-blue detuning asymmetry in matter-wave superradiance, Physical Review Letters, [online], (Accessed June 19, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created November 23, 2010, Updated November 10, 2018