Precision spectroscopy and density-dependent frequency shifts in ultracold Sr.
By varying the density of an ultracold 88Sr sample from 10(9) to>10(12) cm(-3), we make the first definitive measurement of the density-related frequency shift and linewidth broadening of the 1S0-3P1 optical clock transition in an alkaline earth system. In addition, we report the most accurate measurement to date of the 88Sr 1S0-3P1 optical clock transition frequency. Including a detailed analysis of systematic errors, the frequency is [434 829 121 312 334+/-20(stat)+/-33(syst)] Hz.
Ido
Tetsuya
T
JILA, National Institute of Standards and Technology and University of Colorado, Boulder, Colorado 80309-0440, USA.
Loftus
Thomas H
TH
Boyd
Martin M
MM
Ludlow
Andrew D
AD
Holman
Kevin W
KW
Ye
Jun
J