Related Experiment Videos
Precision spectroscopy and density-dependent frequency shifts in ultracold Sr
Tetsuya Ido1, Thomas H Loftus, Martin M Boyd
1JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA.
Physical Review Letters
|May 21, 2005
Summary
Researchers precisely measured the 88Sr 1S0-3P1 optical clock transition frequency. This study provides the first definitive measurement of density-related shifts and broadening in alkaline earth atoms.
Area of Science:
- Atomic Physics
- Quantum Optics
- Metrology
Background:
- Optical atomic clocks are crucial for fundamental physics and metrology.
- Alkaline earth atoms are promising candidates for high-precision optical clocks.
- Density-dependent effects can limit the accuracy of atomic clocks.
Purpose of the Study:
- To measure the frequency shift and linewidth broadening of the 88Sr 1S0-3P1 transition due to atomic density.
- To report the most accurate frequency measurement of the 88Sr 1S0-3P1 optical clock transition.
- To analyze systematic errors affecting the transition frequency.
Main Methods:
- Utilizing ultracold 88Sr samples with densities ranging from 10^9 to over 10^12 cm^-3.
- Performing precise spectroscopic measurements of the 1S0-3P1 transition.
- Conducting a detailed analysis of systematic errors, including density-related effects.
Main Results:
- The first definitive measurement of density-related frequency shift and linewidth broadening for the 88Sr 1S0-3P1 transition.
- The most accurate measurement to date of the 88Sr 1S0-3P1 optical clock transition frequency: 434,829,121,312,334 ± 20(stat) ± 33(syst) Hz.
- Comprehensive characterization of systematic uncertainties.
Conclusions:
- Density effects in ultracold 88Sr are quantified, providing crucial data for clock design.
- The reported frequency measurement sets a new benchmark for optical clock accuracy.
- This work advances the development of strontium-based optical atomic clocks.