NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
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
Published
Author(s)
Lu Deng, Edward W. Hagley, Marvin G. Payne
Abstract
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].
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], https://doi.org/10.1103/PhysRevLett.106.118902
(Accessed October 7, 2025)