Atomic-Molecular Condensates with Large Positive Scattering Length

Details Atomic-Molecular Condensates with Large Positive Scattering Length Atomic-Molecular Condensates with Large Positive Scattering Length

2002-10-09

arxiv.org/abs/cond-mat/0210217v2

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 new figures, a few new references and rewritten text, conclusions unchanged

Scientific paper

We show that in the limit of large and positive atom--atom scattering length the properties of an atomic--molecular Bose--Einstein Condensate (amBEC) are determined by an universal energy density functional (EDF). We find that the optimal conditions for the formation of a stable amBEC are in the regime where there are no shallow trimers and the atom--dimer scattering length is negative and comparable in magnitude with the atom--atom scattering length. At temperatures lower than $T_c$ the chemical potentials for the atoms and molecules can be specified independently. Besides three--body recombinations processes into dimers of large size, inelastic processes involving the formation of deeply bound small size molecular states are possible. These inelastic processes do not lead to an efficient heating of the amBEC and can be used for its mostly non--destructive monitoring.

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