Peculiarities of Joint Influence of Atomic Motion and Hyperfine Splitting of an Excited State on the Shape of Resonance of Coherent Population Trapping in a Rarefied Gas

We have studied the joint influence of atomic motion and hyperfine splitting on the form of resonance of coherent population trapping (CPT) in a rarefied gas. It is shown that in the presence of the hyperfine structure of the excited level, the motion of atoms leads to an optical shift of the CPT re...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2021-11, Vol.133 (5), p.525-532
Main Authors: Barantsev, K. A., Kuraptsev, A. S., Litvinov, A. N.
Format: Article
Language:English
Subjects:
Atoms
Classical and Quantum Gravitation
Elementary Particles
Excitation
Hyperfine structure
Molecules
Optics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theory
Rarefied gases
Relativity Theory
Resonance
Solid State Physics
Splitting
Trapping
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Summary:We have studied the joint influence of atomic motion and hyperfine splitting on the form of resonance of coherent population trapping (CPT) in a rarefied gas. It is shown that in the presence of the hyperfine structure of the excited level, the motion of atoms leads to an optical shift of the CPT resonance. We have derived an analytic expression for this shift for individual velocity groups of atoms. It is found that there exists additional CPT resonance emerging as a result of the interaction with a nonresonant excited hyperfine level. We have considered the effect of the value of hyperfine splitting of the ground and excited states, as well of temperature, on the shift of the CPT resonance.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776121110017