Asymptotic model for shape resonance control of diatomics by intense non-resonant light
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Elastic ultracold collisionsShape resonancesLaser-modified scattering
Crubellier, A.; et al. Asymptotic model for shape resonance control of diatomics by intense non-resonant light. New Journal of Physics, 17: 045020 (2015). 
SponsorshipFinancial support by the Spanish Ministry of Science FIS2011-24540 (MICINN), grants P11-FQM-7276 and FQM-4643 (Junta de Andalucía), and by the Andalusian research group FQM-207.
We derive a universal model for atom pairs interacting with non-resonant light via the polarizability anisotropy, based on the long range properties of the scattering. The corresponding dynamics can be obtained using a nodal line technique to solve the asymptotic Schrödinger equation. It consists of imposing physical boundary conditions at long range and vanishing the wavefunction at a position separating the inner zone and the asymptotic region. We show that nodal lines which depend on the intensity of the non-resonant light can satisfactorily account for the effect of the polarizability at short range. The approach allows to determine the resonance structure, energy, width, channel mixing and hybridization even for narrow resonances.