Towards Probing a Variation of Fundamental Constants with Optical Clock Transitions of 127I2

Florin Lucian Constantin (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

Precision measurements of the molecular iodine optical transitions can be exploited for constraining a possible time variation of the fundamental constants. The sensitivities of the molecular frequencies to a variation of the proton-toelectron mass ratio and of the fine structure constant are calculated. Compact molecular iodine clocks, designed for space applications with improved stability performances, enable fractional frequency reproducibility at the 10^(-15) level. The comparison of the optical iodine clocks based on transitions at 532 nm, 514 nm and 502 nm with the Cs frequency standard can constrain a fractional time variation of the proton-to-electron mass ratio and of the fine structure constant at the 10^(-14) yr-1 level.

Mots clés: Laser Spectroscopy; Clocks; Rovibronic States; Fundamental Constants

Domaines: Physique Quantique [quant-ph]; Optique [physics.optics]

Florin Lucian Constantin. Towards Probing a Variation of Fundamental Constants with Optical Clock Transitions of 127I2. 2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF), Jul 2020, Keystone, United States. pp.1-3, ⟨10.1109/IFCS-ISAF41089.2020.9234878⟩. ⟨hal-03055497⟩