2005/07/28 by Piet O. Schmidt, T. Rosenband, C. Langer +3 · 10 citations
Chemistry · Mathematics · Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Atomic physics #Chemistry #Coherent anti-Stokes Raman spectroscopy #Coherent spectroscopy #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Initialization #Ion #Laser #Laser cooling #Materials science #Mathematics #Optics #Physics #Quantum #Quantum computer #Quantum logic #Quantum mechanics #Raman spectroscopy #Realization (probability) #Spectroscopy
paper · doi:10.1126/science.1114375
openalex publication_date 2005/07/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
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 technique to make accurate optical clocks based on single ions.