Evaluation of the ultimate performances of a Ca+ single-ion frequency standard

Caroline Champenois (1) , Marie Houssin (1) , Caroline Lisowski (1) , Martina Knoop (1) , Gaetan Hagel (1) , Michel Vedel (1) , Fernande Vedel (1)

1 PIIM - Physique des interactions ioniques et moléculaires

The frequency stability of an optical frequency standard at 729 nm, based on a single calcium ion, is numerically studied. It is investigated through the Allan deviation, whose minimum is estimated to reach σy (τ ) ≈ 2.5 × 10−15 /√τ with τ the integration time. The systematic frequency shifts have been calculated and lead to an achievable relative uncertainty of ±4 × 10−16, supposing the use of the odd isotope 43Ca+ and a vessel cooled to 77 K.

Mots clés: optical frequency standard; ion trapping and cooling; Allan deviation; systematic effects

Domaines: Physique Atomique [physics.atom-ph]

Caroline Champenois, Marie Houssin, Caroline Lisowski, Martina Knoop, Gaetan Hagel, et al.. Evaluation of the ultimate performances of a Ca+ single-ion frequency standard. Physics Letters A, 2004, 331, pp.298. ⟨10.1016/j.physleta.2004.09.008⟩. ⟨hal-00000974v2⟩