TY - JOUR
T1 - Ultracold strontium clock
T2 - applications to the measurement of fundamental constant variations
AU - Ludlow, A. D.
AU - Blatt, S.
AU - Zelevinsky, T.
AU - Campbell, G. K.
AU - Martin, M. J.
AU - Thomsen, Jan Westenkær
AU - Boyd, M. M.
AU - Ye, J.
PY - 2008
Y1 - 2008
N2 - We describe the application of high accuracy Srspectroscopy to the measurement of the variation of thefundamental constants of nature. We first describe recent progressof the JILA Sr optical frequency standard, with a systematicuncertainty evaluation at the 10-16 fractional frequencylevel. Using recent internationally based measurements of the Srclock frequency, we show improved constraints of gravitational andtemporal changes in the fine structure constant and theelectron-proton mass ratio. Finally, we describe how ultracoldatomic strontium, confined in an optical lattice, can beassociated into molecular dimers and be used for amodel-independent measurement of the variation of theelectron-proton mass ratio.
AB - We describe the application of high accuracy Srspectroscopy to the measurement of the variation of thefundamental constants of nature. We first describe recent progressof the JILA Sr optical frequency standard, with a systematicuncertainty evaluation at the 10-16 fractional frequencylevel. Using recent internationally based measurements of the Srclock frequency, we show improved constraints of gravitational andtemporal changes in the fine structure constant and theelectron-proton mass ratio. Finally, we describe how ultracoldatomic strontium, confined in an optical lattice, can beassociated into molecular dimers and be used for amodel-independent measurement of the variation of theelectron-proton mass ratio.
U2 - 10.1140/epjst/e2008-00806-8
DO - 10.1140/epjst/e2008-00806-8
M3 - Journal article
SN - 1951-6355
VL - 163
SP - 9
EP - 18
JO - European Physical Journal. Special topics
JF - European Physical Journal. Special topics
IS - 1
ER -