Association of Atoms into Universal Dimers using an Oscillating Magnetic Field
arXiv:1406.7313 · doi:10.1103/PhysRevLett.114.103002
Abstract
In a system of ultracold atoms near a Feshbach resonance, pairs of atoms can be associated into universal dimers by an oscillating magnetic field with frequency near that determined by the dimer binding energy. We present a simple expression for the transition rate that takes into account many-body effects through a transition matrix element of the contact. In a thermal gas, the width of the peak in the transition rate as a function of the frequency is determined by the temperature. In a dilute Bose-Einstein condensate of atoms, the width is determined by the inelastic scattering rates of a dimer with zero-energy atoms. Near an atom-dimer resonance, there is a dramatic increase in the width from inelastic atom-dimer scattering and from atom-atom-dimer recombination. The recombination contribution provides a signature for universal tetramers that are Efimov states consisting of two atoms and a dimer.
arXiv comment5 pages, 2 figures
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Cited by in corpus (11)
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- Two- and three-body problem with Floquet-driven zero-range interactions
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