Towards 'All Optical'
Bose-Einstein Condensation: Cold and Intense Atomic Beam

Saptarishi Chaudhury & Sanjukta Roy,DHEP,TIFR

Friday, 9th September 2005

 

ABSTRACT

Design, construction and characterization of a source of intense, cold and tunable neutral atomic beam will be discussed. These atoms are then captured and further cooled in a high-density Magneto-Optical trap (MOT), making the system a favourable starting point for production of Bose-Einstein condensate in an all optical dipole trap. In this talk we shall present the general principles and experimental techniques to trap and cool tens of billions of atoms to micro-Kelvin temperature using appropriate laser light and magnetic field. At these ultra-low temperatures, several routes to precision experiments using neutral atoms open up. For example, novel experiments to study quantum electrodynamics of atoms strongly coupled to cavities are possible and atom-surface and atom-cavity interactions can be studied in a near ideal condition. As a specific example, we shall discuss behaviour of cold atoms moving through a high-finesse cavity. Quantum degeneracy and atomic Bose-Einstein condensates are produced starting from a cloud of ultra-cold atoms in a MOT. These cold atoms can also be trapped in a micro-optical lattice, making it possible to do quantum measurements on single atom. This talk is meant to be a general introduction to the topic of Laser Cooling and Trapping of Neutral Atoms along with a brief description of a state-of-the-art experimental set-up built here facilitating high precision experiments.


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