Spin-1/2 optical lattice clock.
We experimentally investigate an optical clock based on ;{171}Yb (I = 1/2) atoms confined in an optical lattice. We have evaluated all known frequency shifts to the clock transition, including a density-dependent collision shift, with a fractional uncertainty of 3.4 x 10;{-16}, limited principally by uncertainty in the blackbody radiation Stark shift. We measured the absolute clock transition frequency relative to the NIST-F1 Cs fountain clock and find the frequency to be 518 295 836 590 865.2(0.7) Hz.
Lemke
N D
ND
National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
Ludlow
A D
AD
Barber
Z W
ZW
Fortier
T M
TM
Diddams
S A
SA
Jiang
Y
Y
Jefferts
S R
SR
Heavner
T P
TP
Parker
T E
TE
Oates
C W
CW