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Imaging the Temperature of Laser-Cooled Ions

B. G. Norton, Erik W. Streed, Andreas Jechow, M. J. Petrasiunas, D. Kielpinski

Published Jan 1, 2011• 0 citations
Publisher

Abstract

We demonstrate milli-Kelvin precision thermometry of laser cooled trapped ions using high-resolution imaging. This steady state approach can be used to investigate ion temperatures even when the laser cooling dynamics are highly anisotropic.
DOI
10.1364/iqec.2011.i953

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We demonstrate millikelvin thermometry of laser-cooled trapped ions with high-resolution imaging. This equilibrium approach is independent of the cooling dynamics and has lower systematic error than Doppler thermometry, with ±5 mK accuracy and ±1 mK precision. We used it to observe the highly anisotropic dynamics of a single ion, finding temperatures of <60 mK and >15 K simultaneously along different directions. This thermometry technique can offer new insights into quantum systems sympathetically cooled by ions, including atoms, molecules, nanomechanical oscillators and electric circuits.