164 citations · 261 across the 2 of their papers we have counts for
4 papers · 1 filter
Absolute frequency measurement of the 40Ca+ S1/2 - D5/2 clock transition
M. Chwalla, J. Benhelm, K. Kim +12
We report on the first absolute transition frequency measurement at the 10^{-15} level with a single, laser-cooled 40Ca+ ion in a linear Paul trap. For this measurement, a frequenc…
An Optical Lattice Clock with Spin-polarized 87Sr Atoms
Xavier Baillard, Mathilde Fouché, Rodolphe Le Targat +14
We present a new evaluation of an 87Sr optical lattice clock using spin polarized atoms. The frequency of the 1S0-3P0 clock transition is found to be 429 228 004 229 873.6 Hz with…
Cold atom Clocks and Applications
S. Bize, P. Laurent, M. Abgrall +14
This paper describes advances in microwave frequency standards using laser-cooled atoms at BNM-SYRTE. First, recent improvements of the Cs and Rb atomic fountains ar…
A Search for Variations of Fundamental Constants using Atomic Fountain Clocks
H. Marion, F. Pereira Dos Santos, M. Abgrall +12
Over five years we have compared the hyperfine frequencies of 133Cs and 87Rb atoms in their electronic ground state using several laser cooled 133Cs and 87Rb atomic fountains with…