Polarization-gradient cooling of 1D and 2D ion Coulomb crystals
Open Access
- 1 October 2020
- journal article
- research article
- Published by IOP Publishing in New Journal of Physics
- Vol. 22 (10), 103013
- https://doi.org/10.1088/1367-2630/abb912
Abstract
We present experiments on polarization gradient cooling of Ca+ multi-ion Coulomb crystals in a linear Paul trap. Polarization gradient cooling of the collective modes of motion whose eigenvectors have overlap with the symmetry axis of the trap is achieved by two counter-propagating laser beams with mutually orthogonal linear polarizations that are blue-detuned from the S 1/2 ↔ P 1/2 transition. We demonstrate cooling of linear chains of up to 51 ions and 2D-crystals in zig-zag configuration with 22 ions. The cooling results are compared with numerical simulations and the predictions of a simple model of cooling in a moving polarization gradient.Keywords
Funding Information
- Horizon 2020 Framework Programme (741541 817482)
- Austrian Science Fund (F71)
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