Zero-point cooling and heating-rate measurements of a single Sr+88 ion

V. Letchumanan, G. Wilpers, M. Brownnutt, P. Gill, and A. G. Sinclair
Phys. Rev. A 75, 063425 – Published 28 June 2007

Abstract

A single Sr+88 ion has been cooled to the zero point of its axial motion in a radio frequency endcap trap. A ground-state occupation probability of 98.6(8)% was achieved using resolved sideband laser cooling on the 674nm S122D522 quadrupole transition. The ion’s heating rate was measured to be 0.054(4) quanta/ms, implying a spectral density of electric field noise comparable to the other reported values, summarized in the paper by Deslauriers et al. [Phys. Rev. A 70, 043048 (2004)]. Low heating rates were only observed using a trap that had minimal exposure to atomic flux.

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  • Received 24 January 2007

DOI:https://doi.org/10.1103/PhysRevA.75.063425

Authors & Affiliations

V. Letchumanan, G. Wilpers, M. Brownnutt*, P. Gill, and A. G. Sinclair

  • National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom

  • *Also at Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, UK.
  • Electronic address: alastair.sinclair@npl.co.uk

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Issue

Vol. 75, Iss. 6 — June 2007

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