Sympathetic cooling in a multi-isotope Sr+ Coulomb crystal

S. Removille; Q. Glorieux; T. Coudreau; L. Guidoni; J.-P. Likforman; S. Guibal

doi:10.1117/12.855579

4 June 2010 Sympathetic cooling in a multi-isotope Sr⁺ Coulomb crystal

S. Removille, Q. Glorieux, T. Coudreau, L. Guidoni, J.-P. Likforman, S. Guibal

Proceedings Volume 7727, Quantum Optics; 77270T (2010) https://doi.org/10.1117/12.855579
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

This paper reports on trapping and laser-cooling of singly-ionized strontium ions in a linear Paul trap. We demonstrate loading of large ion clouds containing as much as 10⁶ ions and laser cooling down to the Coulomb crystal transition. We observe the spatial segregation of the different Sr+ isotopes due to the mass-dependent Paul trap stiffness. Sympathetic cooling of the different isotopes is demonstrated, either by laser-cooling of ⁸⁸Sr+ (83% abundance) or of ⁸⁶Sr+ (10% abundance). These demonstrations open the way to the use of a large ion Coulomb crystal for quantum optics and quantum information experiments, where the strong confinement, the long lifetime, and the absence of perturbation by cooling lasers are crucial.

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S. Removille, Q. Glorieux, T. Coudreau, L. Guidoni, J.-P. Likforman, and S. Guibal "Sympathetic cooling in a multi-isotope Sr⁺ Coulomb crystal", Proc. SPIE 7727, Quantum Optics, 77270T (4 June 2010); https://doi.org/10.1117/12.855579

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