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Article Dans Une Revue Physical Review A Année : 2020

Laser-stimulated deexcitation of Rydberg antihydrogen atoms

D. Comparat
C. Malbrunot
  • Fonction : Auteur

Résumé

Antihydrogen atoms are routinely formed at CERN in a broad range of Rydberg states. Ground-state antiatoms, those useful for precision measurements, are eventually produced through spontaneous decay. However given the long lifetime of Rydberg states the number of ground-state antihydrogen atoms usable is small, in particular for experiments relying on the production of a beam of antihydrogen atoms. Therefore, it is of high interest to efficiently stimulate the decay in order to retain a higher fraction of ground-state atoms for measurements. We propose a method that optimally mixes the high angular momentum states with low ones enabling us to stimulate, using a broadband frequency laser, the deexcitation toward low-lying states, which then spontaneously decay to the ground state. We evaluate the method in realistic antihydrogen experimental conditions. For instance, starting with an initial distribution of atoms within the n = 20-30 manifolds, as formed through the charge exchange mechanism, we show that more than 80% of antihydrogen atoms will be deexcited to the ground state within 100 ns using a laser producing 2 J at 828 nm.
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2019 Erratum Laser-stimulated deexcitation of Rydberg antihydrogen atoms Malbruno Comparat PRA.pdf (268.22 Ko) Télécharger le fichier
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Dates et versions

hal-02490119 , version 1 (23-11-2020)

Identifiants

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D. Comparat, C. Malbrunot. Laser-stimulated deexcitation of Rydberg antihydrogen atoms. Physical Review A, 2020, 101 (1), ⟨10.1103/PhysRevA.101.019904⟩. ⟨hal-02490119⟩
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