Feedback Cooling of a Single Neutral Atom

Markus Koch, Christian Sames, Alexander Kubanek, Matthias Apel, Maximilian Balbach, Alexei Ourjoumtsev, Pepijn W. H. Pinkse, Gerhard Rempe

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56 Citations (Scopus)
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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
Original languageEnglish
Pages (from-to)173003-1-4
Number of pages4
JournalPhysical review letters
Issue number17
Publication statusPublished - 2010


  • METIS-269773
  • IR-78585


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