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Quantum Chemistry

Directional Quantum-Controlled Chemistry: Generating Aligned Ultracold Molecules via Photoassociation

arXiv

Authors: S. Kallush, J. L. Carini, P. L. Gould, R. Kosloff

Year

2017

Paper ID

45077

Status

Preprint

Abstract Read

~2 min

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Abstract

Photoassociation of ultracold atoms is shown to lead to alignment of the product molecules along the excitation laser polarization axis. We theoretically investigate pulsed photoassociation of ⁸⁷Rb atoms into a specific weakly-bound level of the a ³Σ_u^+ metastable electronic state and find both stationary and time-dependent field-free alignment. Although a transform-limited pulse yields significant alignment, a frequency-chirped pulse dramatically enhances the molecular formation rate at the cost of a slight decrease in the alignment. Employing multiple pulses synchronized with the vibrational and rotational periods leads to coherent enhancement of both population and alignment of the target state.

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Photoassociation of ultracold atoms is shown to lead to alignment of the product molecules along the excitation laser polarization axis.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1706.06834 [2] arXiv https://arxiv.org/abs/1706.06834 [3] Publisher https://arxiv.org/abs/1706.06834

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