Physics – Quantum Physics
Scientific paper
2003-08-29
Phys. Rev. A 69, 013405 (2004).
Physics
Quantum Physics
11 pages, 4 Figures
Scientific paper
10.1103/PhysRevA.69.013405
We investigate theoretically the spectrum of resonance fluorescence of a harmonically trapped atom, whose internal transitions are $\Lambda$--shaped and driven at two-photon resonance by a pair of lasers, which cool the center--of--mass motion. For this configuration, photons are scattered only due to the mechanical effects of the quantum interaction between light and atom. We study the spectrum of emission in the final stage of laser--cooling, when the atomic center-of-mass dynamics is quantum mechanical and the size of the wave packet is much smaller than the laser wavelength (Lamb--Dicke limit). We use the spectral decomposition of the Liouville operator of the master equation for the atomic density matrix and apply second order perturbation theory. We find that the spectrum of resonance fluorescence is composed by two narrow sidebands -- the Stokes and anti-Stokes components of the scattered light -- while all other signals are in general orders of magnitude smaller. For very low temperatures, however, the Mollow--type inelastic component of the spectrum becomes visible. This exhibits novel features which allow further insight into the quantum dynamics of the system. We provide a physical model that interprets our results and discuss how one can recover temperature and cooling rate of the atom from the spectrum. The behaviour of the considered system is compared with the resonance fluorescence of a trapped atom whose internal transition consists of two-levels.
Bienert Marc
Merkel Wolfgang
Morigi Giovanna
No associations
LandOfFree
Resonance fluorescence of a trapped three-level atom 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 Resonance fluorescence of a trapped three-level atom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonance fluorescence of a trapped three-level atom will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-258164