New Limits on Coupling of Fundamental Constants to Gravity Using $^{87}$Sr Optical Lattice Clocks

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dc.creatorBlatt, S.
dc.creatorLudlow, A. D.
dc.creatorCampbell, G. K.
dc.creatorThomsen, J. W.
dc.creatorZelevinsky, T.
dc.creatorBoyd, M. M.
dc.creatorYe, J.
dc.creatorBaillard, X.
dc.creatorFouché, M.
dc.creatorTargat, R. Le
dc.creatorBrusch, A.
dc.creatorLemonde, P.
dc.creatorTakamoto, M.
dc.creatorHong, F. -L.
dc.creatorKatori, H.
dc.creatorFlambaum, V. V.
dc.date2008-01-12
dc.date2008-04-29
dc.date.accessioned2026-07-07T11:14:03Z
dc.date.available2026-07-07T11:14:03Z
dc.descriptionThe $^1\mathrm{S}_0$-$^3\mathrm{P}_0$ clock transition frequency $ν_\text{Sr}$ in neutral $^{87}$Sr has been measured relative to the Cs standard by three independent laboratories in Boulder, Paris, and Tokyo over the last three years. The agreement on the $1\times 10^{-15}$ level makes $ν_\text{Sr}$ the best agreed-upon optical atomic frequency. We combine periodic variations in the $^{87}$Sr clock frequency with $^{199}$Hg$^+$ and H-maser data to test Local Position Invariance by obtaining the strongest limits to date on gravitational-coupling coefficients for the fine-structure constant $α$, electron-proton mass ratio $μ$ and light quark mass. Furthermore, after $^{199}$Hg$^+$, $^{171}$Yb$^+$ and H, we add $^{87}$Sr as the fourth optical atomic clock species to enhance constraints on yearly drifts of $α$ and $μ$.
dc.descriptionPublished version. 4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0801.1874
dc.identifierhttp://arxiv.org/abs/0801.1874
dc.identifierPhys.Rev.Lett.100:140801,2008
dc.identifierdoi:10.1103/PhysRevLett.100.140801
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191932
dc.subjectAtomic Physics
dc.subjectGeneral Physics
dc.titleNew Limits on Coupling of Fundamental Constants to Gravity Using $^{87}$Sr Optical Lattice Clocks
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