Feedback cooling of a single trapped ion.
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.
Institute for Experimental Physics, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.
Pavel
P
Bushev
Daniel
D
Rotter
Alex
A
Wilson
François
F
Dubin
Christoph
C
Becher
Jürgen
J
Eschner
Rainer
R
Blatt
Viktor
V
Steixner
Peter
P
Rabl
Peter
P
Zoller