Gain narrowing in few-atom systems
Quantum Physics
2015-06-26 v2
Abstract
Using a density matrix approach, we study the simplest systems that display both gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The other atoms supply feedback through multiple scattering of light. We show that, if the atoms are in each other's near-field, the system exhibits large gain narrowing and spectral mode redistribution. The observed phenomena are more pronounced if the feedback is enhanced. Our system is to our knowledge the simplest exactly solvable microscopic system which shows the approach to laser oscillation.
Cite
@article{arxiv.quant-ph/0604040,
title = {Gain narrowing in few-atom systems},
author = {Tom Savels and Allard P. Mosk and Ad Lagendijk},
journal= {arXiv preprint arXiv:quant-ph/0604040},
year = {2015}
}