Physics – Quantum Physics
Scientific paper
2006-03-21
Physics
Quantum Physics
11 pages, 6 figures
Scientific paper
10.1103/PhysRevA.74.033806
We present a microscopic laser model for many atoms coupled to a single cavity mode, including the light forces resulting from atom-field momentum exchange. Within a semiclassical description, we solve the equations for atomic motion and internal dynamics to obtain analytic expressions for the optical potential and friction force seen by each atom. When optical gain is maximum at frequencies where the light field extracts kinetic energy from the atomic motion, the dynamics combines optical lasing and motional cooling. From the corresponding momentum diffusion coefficient we predict sub-Doppler temperatures in the stationary state. This generalizes the theory of cavity enhanced laser cooling to active cavity systems. We identify the gain induced reduction of the effective resonator linewidth as key origin for the faster cooling and lower temperatures, which implys that a bad cavity with a gain medium can replace a high-Q cavity. In addition, this shows the importance of light forces for gas lasers in the low-temperature limit, where atoms can arrange in a periodic pattern maximizing gain and counteracting spatial hole burning. Ultimately, in the low temperature limit, such a setup should allow to combine optical lasing and atom lasing in single device.
No associations
LandOfFree
Lasing and cooling in a hot cavity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Lasing and cooling in a hot cavity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lasing and cooling in a hot cavity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-302874