Rapid Adiabatic Passage from an Atomic to a Molecular Condensate

2002/10/31 by Mackie, Matt, Carmichael, Andrew, Kostrun, Marijan +5
#Atomic Physics (physics.atom-ph) #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Quantum Physics (quant-ph) #Soft Condensed Matter (cond-mat.soft) #Statistical Mechanics (cond-mat.stat-mech)

paper · doi:10.48550/arxiv.physics/0210131

Abstract

We examine collective magnetoassociation of a Bose-Einstein condensate (BEC), focusing on rapid adiabatic passage from atoms to molecules induced by a sweep of the magnetic field across a wide (>~ 10 G) Feshbach resonance in 85Rb. This problem raises an interest because strong magnetoassociation is expected to favor the creation of molecular-dissociated atom pairs over the formation of molecular BEC [Javanainen and Mackie, Phys. Rev. Lett. 88, 090403 (2002)]. Nevertheless, the conversion to atom pairs is found to depend on the direction of the sweep, so that a system initially above threshold (open dissociation channel) may in fact give near-complete conversion to molecules.

Related

• Adiabatic association of ultracold molecules via magnetic field tunable interactions
• Zero-Temperature Theory of Collisionless Rapid Adiabatic Passage from a Fermi Degenerate Gas of Atoms to a Bose-Einstein Condensate of Molecules
• Coherent, adiabatic and dissociation regimes in coupled atomic-molecular Bose-Einstein condensates
• Non-adiabatic dissociation of molecules and BEC loss due to shock-waves
• Heating and atom loss during upward ramps of Feshbach resonance levels in Bose-Einstein condensates