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arXiv · 1903.05897

Raman sideband cooling of a single atom in an optical dipole trap: Towards theoretical optimum in a three-dimensional regime

V. M. Porozova·L. V. Gerasimov·I. B. Bobrov·S. S. Straupe·S. P. Kulik·D. V. Kupriyanov
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Abstract

We clarify the optimal conditions for the protocol of Raman sideband cooling (RSC) of a single atom confined with a tightly focused far-off-resonant optical dipole trap (optical tweezers). The protocol ultimately pursues cooling to a three-dimensional ground state of the confining potential. We show that the RSC protocol has to fulfil a set of critical requirements for the parameters of cooling beams and the excitation geometry to be effective in a most general three-dimensional confguration and for an atom, having initial temperature between the recoil and the Doppler bounds. We perform a numerical simulation of the Raman passage for an example of an $^{85}$Rb atom taking into account the full level structure and all possible transition channels.

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V. M. Porozova, L. V. Gerasimov, I. B. Bobrov, S. S. Straupe, S. P. Kulik, D. V. Kupriyanov. 2019-03-14. Raman sideband cooling of a single atom in an optical dipole trap: Towards theoretical optimum in a three-dimensional regime. https://doi.org/10.1103/physreva.99.043406

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