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