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Phys. Rev. Lett. 96, 043003 (2006) [4 pages]

Feedback Cooling of a Single Trapped Ion

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Pavel Bushev1,*, Daniel Rotter1, Alex Wilson1, François Dubin1, Christoph Becher1,†, Jürgen Eschner1,‡, Rainer Blatt1,3, Viktor Steixner2,3, Peter Rabl2,3, and Peter Zoller2,3
1Institute for Experimental Physics, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
2Institute for Theoretical Physics, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
3Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, 6020 Innsbruck, Austria

Received 16 September 2005; published 3 February 2006

Based on a real-time measurement of the motion of a single ion in a Paul trap, we demonstrate its electromechanical cooling below the Doppler limit by homodyne feedback control (cold damping). The feedback cooling results are well described by a model based on a quantum mechanical master equation.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.043003
DOI:
10.1103/PhysRevLett.96.043003
PACS:
32.80.Lg, 32.80.Pj, 42.50.Lc, 42.50.Vk

*Present address: Laboratory of Physical Chemistry, ETH Zürich, Switzerland.

†Present address: Fachrichtung Technische Physik, Saarland University, Saarbrücken, Germany.

‡Present address: ICFO—Institut de Ciències Fotòniques, 08860 Castelldefels (Barcelona), Spain.

 
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