Making ultracold molecules in a two color pump-dump photoassociation scheme using chirped pulses

Details Making ultracold molecules in a two color pump-dump photoassociation scheme using chirped pulses Making ultracold molecules in a two color pump-dump photoassociation scheme using chirped pulses

2005-08-14

arxiv.org/abs/physics/0508090v1

Phys. Rev. A 73, 033408 (2006)

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevA.73.033408

This theoretical paper investigates the formation of ground state molecules from ultracold cesium atoms in a two-color scheme. Following previous work on photoassociation with chirped picosecond pulses [Luc-Koenig et al., Phys. Rev. A {\bf 70}, 033414 (2004)], we investigate stabilization by a second (dump) pulse. By appropriately choosing the dump pulse parameters and time delay with respect to the photoassociation pulse, we show that a large number of deeply bound molecules are created in the ground triplet state. We discuss (i) broad-bandwidth dump pulses which maximize the probability to form molecules while creating a broad vibrational distribution as well as (ii) narrow-bandwidth pulses populating a single vibrational ground state level, bound by 113 cm$^{-1}$. The use of chirped pulses makes the two-color scheme robust, simple and efficient.

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