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.

Reply to “Comment on “Electromagnetic Wave Dynamics in Matter-Wave Superradiant Scattering” by Wolfgang Ketterle



Lu Deng, Edward W. Hagley, Marvin G. Payne


The comment by W. Ketterle [1] purports having a viable model of superradiance. However, Ref. [1] admits not being able to explain the red/blue pump detuning asymmetry in matter-wave superradiance that was first observed recently by us [2]. It is clear from what we show below that the rate-equation-based theories of Ref. [1] are incomplete and only model the final growth stage of the process when a red-detuned pump is used. Our theoretical framework [3], on the other hand, treats the initial growth stage of superradiance and is therefore capable of explaining the genesis of the red/blue detuning asymmetry [2]. This is the key message of our response, which we frame in terms of reference to the specific points raised in Ref. [1].
Physical Review Letters


red/blue pump detuning asymmetry, superradiance


Deng, L. , Hagley, E. and Payne, M. (2011), Reply to “Comment on “Electromagnetic Wave Dynamics in Matter-Wave Superradiant Scattering” by Wolfgang Ketterle, Physical Review Letters, [online], (Accessed June 12, 2024)


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

Created March 18, 2011, Updated June 2, 2021