Suppression of power-broadening in strong-coupling photoassociation in the presence of a Feshbach resonance

Abstract

Photoassociation (PA) spectrum in the presence of a magnetic Feshbach resonance is analyzed. Nonperturbative solution of the problem yields analytical expressions for PA linewidth and shift which are applicable for arbitrary PA laser intensity and magnetic field tuning of Feshbach Resonance. We show that by tuning magnetic field close to Fano minimum, it is possible to suppress power broadening at increased laser intensities. This occurs due to quantum interference of PA transitions from unperturbed and perturbed continuum. Line narrowing at high laser intensities is accompanied by large spectral shifts. We briefly discuss important consequences of line narrowing in cold collisions.

12 pages, 5 figures

References in corpus (13)

• A High Phase-Space-Density Gas of Polar Molecules
• Tuning the scattering length with an optically induced Feshbach resonance
• Extreme tunability of interactions in a ${}^7$Li Bose-Einstein condensate
• Coherent optical transfer of Feshbach molecules to a lower vibrational state
• Atom-molecule dark states in a Bose-Einstein condensate
• Inducing an optical Feshbach resonance via stimulated Raman coupling
• Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
• Accurate determination of the scattering length of metastable Helium atoms using dark resonances between atoms and exotic molecules
• Photoassociation of a Bose-Einstein Condensate near a Feshbach Resonance
• Efficient formation of ground state ultracold molecules via STIRAP from the continuum at a Feshbach resonance
• Sub-Natural-Linewidth Quantum Interference Features Observed in Photoassociation of a Thermal Gas
• Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances
• Manipulating Higher Partial-Wave Atom-Atom Interaction by Strong Photoassoiative Coupling

Cited by in corpus (8)

• Feshbach Resonance Induced Fano Interference in Photoassociation
• Magneto-optical Feshbach resonance: Controlling cold collision with quantum interference
• Resonant enhancement of ultracold photoassociation rate by electric field induced anisotropic interaction
• Photoassociation of ultracold molecules near a Feshbach resonance as a probe of the electron-proton mass ratio variation
• Vacuum-Induced Coherence in Ultracold Photoassociative Ro-Vibrational Excitations
• Resonant Manipulation of d-wave Interaction of Cold Atoms with Two Lasers and a Magnetic Field
• Quantum Effects at Low Energy Atom-Molecule Interface
• Defying Conventional Wisdom in Spectroscopy: Power Narrowing on IBM Quantum