Spectroscopy Using Quantum Logic

We present a general technique for precision spectroscopy of atoms that lack suitable transitions for efficient laser cooling, internal state preparation, and detection. In our implementation with trapped atomic ions, an auxiliary "logic" ion provides sympathetic laser cooling, state initialization, and detection for a simultaneously trapped "spectroscopy" ion. Detection is achieved by applying a mapping operation to each ion, which results in a coherent transfer of the spectroscopy ion's internal state onto the logic ion, where it is then measured with high efficiency. Experimental realization, by using 9Be+ as the logic ion and 27Al+ as the spectroscopy ion, indicates the feasibility of applying this…

• UK
  Univerzita Karlova v Praze
• NR
  National Research Foundation
• BF
  Bundesministerium für Bildung und Forschung
• M
  Max-Planck-Gesellschaft
• CN
  Centre National de la Recherche Scientifique

  Award: CNRS-IN2P3
• UO
  University of Namibia
• IN
  Institut National de Physique Nucléaire et de Physique des Particules