Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-09-24
Physics
Condensed Matter
Quantum Gases
OSA TOPS on Ultracold Atoms and BEC 7 (1997) 58
Scientific paper
We present a new and efficient implementation of Raman cooling of trapped atoms. It uses Raman pulses with an appropriate frequency chirp to realize a velocity selective excitation through a rapid adiabatic passage. This method allows to address in a single pulse a large number of non zero atomic velocity classes and it produces a nearly unity transfer efficiency. We demonstrate this cooling method using cesium atoms in a far-detuned crossed dipole trap. Three-dimensional cooling of $1 \times 10^{5}$ atoms down to $2 \mu$K is performed in 100 ms. In this preliminary experiment the final atomic density is $1.3\times 10^{12}$ at/cm$^3$ (within a factor of 2) and the phase-space density increase over the uncooled sample is 20. Numerical simulations indicate that temperatures below the single photon recoil temperature should be achievable with this method.
Hänsel Wolfgang
Kuhn Axel
Perrin Hélène
Salomon Christophe
No associations
LandOfFree
Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic Passage 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 Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic Passage, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three Dimensional Raman Cooling using Velocity Selective Rapid Adiabatic Passage will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-602410