Feshbach Resonance Induced Fano Interference in Photoassociation

Abstract

We consider photoassociation from a state of two free atoms when the continuum state is close to a magnetic field induced Feshbach resonance and analyze Fano interference in photoassociation. We show that the minimum in photoassociation profiles characterized by the Fano asymmetry parameter $q$ is independent of laser intensity, while the maximum explicitly depends on laser intensity. We further discuss the possibility of nonlinear Fano effect in photoassociation near a Feshbach resonance.

6 pages 4 figures, substantial change with new results in version 2

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• Resonant enhancement of ultracold photoassociation rate by electric field induced anisotropic interaction
• Vacuum-Induced Coherence in Ultracold Photoassociative Ro-Vibrational Excitations
• Feshbach-resonant Raman photoassociation in a Bose-Einstein condensate
• Fano effect in an ultracold atom-molecule coupled system
• Resonant Manipulation of d-wave Interaction of Cold Atoms with Two Lasers and a Magnetic Field
• Finite-range model potentials for resonant interactions
• Theory of Combined Photoassociation and Feshbach Resonances in a Bose-Einstein Condensate
• Quantum Effects at Low Energy Atom-Molecule Interface
• Modeling atom-atom interactions at low energy by Jost-Kohn potentials
• Multichannel Quantum Defect Theory with Numerical Reference Functions: Applications to Cold Atomic Collisions