Optimizing the photoassociation of cold atoms by use of chirped laser pulses

Abstract

Photoassociation of ultracold atoms induced by chirped picosecond pulses is analyzed in a non-perturbative treatment by following the wavepackets dynamics on the ground and excited surfaces. The initial state is described by a Boltzmann distribution of continuum scattering states. The chosen example is photoassociation of cesium atoms at temperature T=54 $\mu K$ from the $a^3{\Sigma }_u^{+}(6s,6s)$ continuum to bound levels in the external well of the $0_g^{-}(6s+6p_{3/2})$ potential. We study how the modification of the pulse characteristics (carrier frequency, duration, linear chirp rate and intensity) can enhance the number of photoassociated molecules and suggest ways of optimizing the production of stable molecules.

arXiv comment40 pages, 12 figures, submitted to Eur. Phys. J. D

References in corpus (3)

• Production of Ultracold, Polar RbCs* Molecules via Photoassociation
• Stabilization of Ultracold Molecules Using Optimal Control Theory
• Photoassociation of cold atoms with chirped laser pulses: time-dependent calculations and analysis of the adiabatic transfer within a two-state model

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