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High-accuracy optical clock via three-level coherence in neutral bosonic 88Sr
Robin Santra1, Ennio Arimondo, Tetsuya Ido
1JILA, National Institute of Standards and Technology and University of Colorado, Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA.
Physical Review Letters
|May 21, 2005
Summary
A new optical atomic clock design uses two lasers and electromagnetically induced transparency in strontium-88 (88Sr) atoms. This method achieves precise clock transitions, aiming for an accuracy better than 2 x 10(-17).
Area of Science:
- Atomic Physics
- Quantum Optics
- Metrology
Background:
- Optical atomic clocks are crucial for precise timekeeping and fundamental physics tests.
- Strontium-88 (88Sr) atoms offer a promising platform for high-accuracy atomic clocks due to their suitable energy levels.
- Electromagnetically induced transparency (EIT) is a quantum interference effect that can narrow spectral lines.
Purpose of the Study:
- To propose a novel optical atomic clock scheme using 88Sr.
- To achieve ultra-high accuracy by controlling the clock transition linewidth.
- To minimize systematic errors for improved clock performance.
Main Methods:
- Utilizing two lasers to create coherent coupling between the 5s2 1S0 ground state and the 5s5p 3P0 excited state of 88Sr.
- Employing the 5s5p 1P1 state as a mediator for electromagnetically induced transparency.
- Trapping 88Sr atoms in an optical lattice to ensure long interaction times and eliminate Doppler and recoil effects.
- Adjusting laser intensity to control the effective linewidth of the clock transition.
Main Results:
- The proposed scheme allows for tunable effective linewidth of the clock transition.
- Trapping in an optical lattice eliminates Doppler and recoil effects.
- Systematic error analysis indicates a potential clock accuracy better than 2 x 10(-17).
Conclusions:
- The proposed optical atomic clock scheme based on 88Sr and EIT is feasible.
- The design offers a pathway to achieving unprecedented clock accuracy.
- This advancement has significant implications for fundamental science and metrology.