Diatomic molecules in ultracold Fermi gases - Novel composite bosons

Details Diatomic molecules in ultracold Fermi gases - Novel composite bosons Diatomic molecules in ultracold Fermi gases - Novel composite bosons

2005-01-31

arxiv.org/abs/cond-mat/0502010v1

J. Phys. B: At. Mol. Opt. Phys. 38 (2005) S645-S660

Physics

Condensed Matter

Statistical Mechanics

10 pages, 5 figures

Scientific paper

10.1088/0953-4075/38/9/014

We give a brief overview of recent studies of weakly bound homonuclear molecules in ultracold two-component Fermi gases. It is emphasized that they represent novel composite bosons, which exhibit features of Fermi statistics at short intermolecular distances. In particular, Pauli exclusion principle for identical fermionic atoms provides a strong suppression of collisional relaxation of such molecules into deep bound states. We then analyze heteronuclear molecules which are expected to be formed in mixtures of different fermionic atoms. It is found how an increase in the mass ratio for the constituent atoms changes the physics of collisional stability of such molecules compared to the case of homonuclear ones. We discuss Bose-Einstein condensation of these composite bosons and draw prospects for future studies.

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