title: Feedback cooling of a single neutral atom.
abstract: We demonstrate feedback cooling of the motion of a single rubidium atom trapped in a high-finesse optical resonator to a temperature of about 160  μK. Time-dependent transmission and intensity-correlation measurements prove the reduction of the atomic position uncertainty. The feedback increases the 1/e storage time into the 1 s regime, 30 times longer than without feedback. Feedback cooling therefore rivals state-of-the-art laser cooling, but with the advantages that it requires less optical access and exhibits less optical pumping.
authors.affiliation: Max-Planck-Institut für Quantenoptik, Garching, Germany. markus.koch@mpq.mpg.de
authors.forename: Markus
authors.initials: M
authors.lastname: Koch
authors.forename: Christian
authors.initials: C
authors.lastname: Sames
authors.forename: Alexander
authors.initials: A
authors.lastname: Kubanek
authors.forename: Matthias
authors.initials: M
authors.lastname: Apel
authors.forename: Maximilian
authors.initials: M
authors.lastname: Balbach
authors.forename: Alexei
authors.initials: A
authors.lastname: Ourjoumtsev
authors.forename: Pepijn W H
authors.initials: PW
authors.lastname: Pinkse
authors.forename: Gerhard
authors.initials: G
authors.lastname: Rempe