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.
National Institute of Standards and Technology, Boulder, Colorado 80305, USA.
N D
ND
Lemke
A D
AD
Ludlow
Z W
ZW
Barber
T M
TM
Fortier
S A
SA
Diddams
Y
Y
Jiang
S R
SR
Jefferts
T P
TP
Heavner
T E
TE
Parker
C W
CW
Oates