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Theoretical interpretation of the adiabatic transfer between the Na 2P3/2 hyperfine levels in perpendicular electric and magnetic fields

Thomas Heubrandtner, B. Schnizer, Maurizio E. Musso, Laurentius Windholz

Published Jan 1, 1996• 0 citations
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We report observation of transfer between hyperfine levels due to the action of combined external electric and magnetic fields, changing the energy and the angular momentum of the atom. The experiments were performed on a beam of Ga atoms in the fine structure level ${4s}^{2}4p^{2}P_{3/2}$, traversing specially confined and spatially displaced perpendicularly crossed electric and magnetic fields. The hyperfine level transfer was detected by probing the population of the levels involved.

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Hyperfine and Zeeman quantum beats of the Na(3 2P3/2–3 2S1/2) transition, and the decay of coherence

Masaaki Baba, Kazumasa Namba, Hajime Katô

Quantum beats of the Na(3 2P3/2–3 2S1/2) transition and their change with the magnetic field were observed in pure Na vapor and Na+He gas by using a picosecond laser system. The energies of the hyperfine and Zeeman sublevels of the 3 2P3/2 and 3 2S1/2 states were calculated by using the reported hyperfine constants and g factors, and the theoretical curve of the quantum beats was calculated. The results were in good agreement with the observed profile of the quantum beats in phase of modulation, but the difference of the amplitudes increased with time. By comparing the amplitude of the theoretical curve of the quantum beats with that of the experimental curve, we determined the relaxation time of coherence. The decay of amplitude of the modulation was found to become faster as the pressure of the foreign gas (He) was increased. The decay of amplitude, i.e., the decay of coherence arises from the dephasing, which occurs from the fluctuation of the level energies induced by the interatomic interaction.

The Journal of Chemical Physics•May 15, 1989•0 citations

Formation and control of dark states in hyperfine levels of Na atoms

Dmitry K. Efimov, Martins Bruvelis, Nikolai N. Bezuglov +2 more

Вестник Санкт-Петербургского университета. Серия 4. Физика. Химия•Jan 1, 2013•0 citations
We report observation of transfer between hyperfine levels due to the action of combined external electric and magnetic fields, changing the energy and the angular momentum of the atom. The experiments were performed on a beam of Ga atoms in the fine structure level 4s24p2P3/2{4s}^{2}4p^{2}P_{3/2}4s24p2P3/2​, traversing specially confined and spatially displaced perpendicularly crossed electric and magnetic fields. The hyperfine level transfer was detected by probing the population of the levels involved.
Quantum beats of the Na(3 2P3/2–3 2S1/2) transition and their change with the magnetic field were observed in pure Na vapor and Na+He gas by using a picosecond laser system. The energies of the hyperfine and Zeeman sublevels of the 3 2P3/2 and 3 2S1/2 states were calculated by using the reported hyperfine constants and g factors, and the theoretical curve of the quantum beats was calculated. The results were in good agreement with the observed profile of the quantum beats in phase of modulation, but the difference of the amplitudes increased with time. By comparing the amplitude of the theoretical curve of the quantum beats with that of the experimental curve, we determined the relaxation time of coherence. The decay of amplitude of the modulation was found to become faster as the pressure of the foreign gas (He) was increased. The decay of amplitude, i.e., the decay of coherence arises from the dephasing, which occurs from the fluctuation of the level energies induced by the interatomic interaction.