期刊
NEW JOURNAL OF PHYSICS
卷 22, 期 10, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/abb912
关键词
trapped ions; ion crystals; laser cooling; polarization gradient cooling; quantum simulation
资金
- European Research Council (ERC) under the European Union [741541]
- European Union [817482]
- Austrian Science Fund through the SFB BeyondC [F71]
- Institut fur Quanteninformation GmbH
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 theS(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.
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