Stationary phase approximation for the strength of optical Feshbach resonances

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R. Ciury

o
Instytut Fizyki, Uniwersytet Mikolaja Kopernika, ul. Grudzidzka 5/7, 87–100 Toru, Poland

E. Tiesinga and P. S. Julienne
Atomic Physics Division, National Institute of Standards and Technology, 100 Bureau Drive, Stop 8423, Gaithersburg, Maryland 20899-8423, USA

Received 14 November 2005; published 7 August 2006

Analyticexpressions for the width and shift of a photoassociative resonanceor an optically induced Feshbach resonance in ultracold collisions arederived using the quasi-classical stationary phase approximation. This approach forthe width is applicable over a wider range of casesthan the reflection approximation. Possible applications for optical Feshbach resonancesbetween ultracold alkaline-earth-metal atoms, such as Ca and Sr, arediscussed. Our approach also applies to photoassociation in gases ofheteronuclear alkali-metal atoms.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.74.022710
DOI:	10.1103/PhysRevA.74.022710
PACS:	34.50.Rk; 34.10.+x; 32.80.Pj 34.50.Rk Laser-modified scattering and reactions (atoms and molecules) 34.10.+x General theories and models of atomic and molecular collisions and interactions including statistical theories, transition state, stochastic and trajectory models, etc 32.80.Pj Optical cooling of atoms; trapping YEAR: 2006
KEYWORDS:	calcium, photochemistry, strontium, resonant states, association, atom-photon collisions

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