TY - JOUR
T1 - Two-body transients in coupled atomic-molecular BECs
JF - Physical Review Letters
Y1 - 2008
A1 - Pascal Naidon
A1 - Eite Tiesinga
A1 - Paul S. Julienne
AB - We discuss the dynamics of an atomic Bose-Einstein condensate when pairs of atoms are converted into molecules by single-color photoassociation. Three main regimes are found and it is shown that they can be understood on the basis of time-dependent two-body theory. In particular, the so-called rogue dissociation regime [Phys. Rev. Lett., 88, 090403 (2002)], which has a density-dependent limit on the photoassociation rate, is identified with a transient regime of the two-atom dynamics exhibiting universal properties. Finally, we illustrate how these regimes could be explored by photoassociating condensates of alkaline-earth atoms.
VL - 100
UR - http://arxiv.org/abs/0707.2963v2
CP - 9
J1 - Phys. Rev. Lett.
U5 - 10.1103/PhysRevLett.100.093001
ER -
TY - JOUR
T1 - Coherent, adiabatic and dissociation regimes in coupled atomic-molecular Bose-Einstein condensates
Y1 - 2007
A1 - Pascal Naidon
A1 - Eite Tiesinga
A1 - Paul S. Julienne
AB - We discuss the dynamics of a Bose-Einstein condensate of atoms which is suddenly coupled to a condensate of molecules by an optical or magnetic Feshbach resonance. Three limiting regimes are found and can be understood from the transient dynamics occuring for each pair of atoms. This transient dynamics can be summarised into a time-dependent shift and broadening of the molecular state. A simple Gross-Pitaevskii picture including this shift and broadening is proposed to describe the system in the three regimes. Finally, we suggest how to explore these regimes experimentally.
UR - http://arxiv.org/abs/0711.0397v2
ER -
TY - JOUR
T1 - Effective-range description of a Bose gas under strong one- or two-dimensional confinement
JF - New Journal of Physics
Y1 - 2007
A1 - Pascal Naidon
A1 - Eite Tiesinga
A1 - William F. Mitchell
A1 - Paul S. Julienne
AB - We point out that theories describing s-wave collisions of bosonic atoms confined in one- or two-dimensional geometries can be extended to much tighter confinements than previously thought. This is achieved by replacing the scattering length by an energy-dependent scattering length which was already introduced for the calculation of energy levels under 3D confinement. This replacement accurately predicts the position of confinement-induced resonances in strongly confined geometries.
VL - 9
U4 - 19 - 19
UR - http://arxiv.org/abs/physics/0607140v2
CP - 1
J1 - New J. Phys.
U5 - 10.1088/1367-2630/9/1/019
ER -