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Frequency metrology on the 4s 2S1/2 - 4p 2P1/2 transition in the calcium ion for a comparison with quasar data
- Source :
- Phys. Rev. A 78, 032511 (2008)
- Publication Year :
- 2008
-
Abstract
- High accuracy frequency metrology on the 4s 2S1/2 - 4p 2P1/2 transition in calcium ions is performed using laser cooled and crystallized ions in a linear Paul trap. Calibration is performed with a frequency comb laser, resulting in a transition frequency of f=755222766.2(1.7) MHz. The accuracy presents an improvement of more than one order of magnitude, and will facilitate a comparison with quasar data in a search for a possible change of the fine structure constant on a cosmological time scale.<br />Comment: Corrected typos (including one on the axis of figure 6)
- Subjects :
- Physics - Atomic Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. A 78, 032511 (2008)
- Publication Type :
- Report
- Accession number :
- edsarx.0804.4130
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.78.032511