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rf Spectroscopy with a single Ba+ ion.

T W Koerber1, M H Schacht, K R G Hendrickson

  • 1Department of Physics, Box 351560, University of Washington, Seattle, Washington 98195-1560.

Physical Review Letters
|April 17, 2002
PubMed
Summary
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Researchers measured Zeeman resonances in a single trapped barium ion (Ba+) using the shelving method. This technique precisely detected spin-flip transitions, revealing narrow linewidths limited by magnetic field noise.

Area of Science:

  • Atomic Physics
  • Quantum Optics
  • Ion Trapping

Background:

  • Zeeman resonances are crucial for understanding atomic structure and magnetic field interactions.
  • Trapped ions provide a controlled environment for high-precision spectroscopic measurements.

Purpose of the Study:

  • To measure Zeeman resonances of a single trapped Ba+ ion using the shelving method.
  • To investigate the impact of off-resonant light on Zeeman frequencies.
  • To enable precise determination of transition matrix elements in Ba+.

Main Methods:

  • Employed the shelving technique for Zeeman resonance measurements.
  • Utilized optical pumping to select specific magnetic sublevels in the ground and metastable states.
  • Applied an RF field and a probing/shelving mechanism to detect spin-flip transitions.

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Main Results:

  • Observed RF transitions with linewidths as narrow as 15 Hz, limited by magnetic-field noise.
  • Measured the shift in Zeeman frequency induced by off-resonant light illumination.
  • Demonstrated the potential for precise determination of transition matrix elements through simultaneous measurement of light shifts.

Conclusions:

  • The shelving method is effective for high-precision Zeeman resonance measurements in trapped ions.
  • Magnetic-field noise is a primary limitation for achieving narrower linewidths.
  • Light shifts provide a sensitive probe for atomic properties and can be used for precise measurements.