Current Topics in Atomic, Molecular and Optical Physics by Chandana Sinha, Shibshankar Bhattacharyya

By Chandana Sinha, Shibshankar Bhattacharyya

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M. Deb, Eur. Phys. J. D 39, 141 (2006). html Bose-Einstein condensed atomic gases (BECs) are a new class of quantum fluids. They are produced by cooling a dilute atomic gas to nanokelvin temperatures using laser and evaporative cooling techniques. In this paper we review the basic principles behind the experimental realization of Bose-Einstein condensation. We discuss experiments performed in our laboratory at Georgia Tech on quantized vortices formed in the condensate and on a new type of metastable BEC created in a quadrupole magnetic trap.

5 is the difference between the frequencies of two rf synthesizers that are used to drive a single acousto-optic modulator. This creates 2 groups of diffracted atoms propagating to the left and to the right, respectively. We applied a Bragg pulse of square shape with TB = 250/xs, and then turned off the magnetic trap within 100/iS. The atoms expanded for a variable ttof before we took an absorption image using laser light resonant with the F = 1 —> 2 transition in a 250/zs pulse. The result is shown in the 3 horizontal strips that constitute Figure 6c.

They are produced by cooling a dilute atomic gas to nanokelvin temperatures using laser and evaporative cooling techniques. In this paper we review the basic principles behind the experimental realization of Bose-Einstein condensation. We discuss experiments performed in our laboratory at Georgia Tech on quantized vortices formed in the condensate and on a new type of metastable BEC created in a quadrupole magnetic trap. Keywords: Bose-Einstein condensate, laser cooling, atom laser 1. Introduction When a gas of bosonic atoms is cooled below a critical temperature Tc, a large fraction of the atoms condenses into the lowest quantum state.

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