New Limits on Coupling of Fundamental Constants to Gravity Using $^{87}$Sr Optical Lattice Clocks
| Autor: | Blatt, S., Ludlow, A. D., Campbell, G. K., Thomsen, J. W., Zelevinsky, T., Boyd, M. M., Ye, J., Baillard, X., Fouché, M., Targat, R. Le, Brusch, A., Lemonde, P., Takamoto, M., Hong, F. -L., Katori, H., Flambaum, V. V. |
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| Rok vydání: | 2008 |
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| Zdroj: | Phys.Rev.Lett.100:140801,2008 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.100.140801 |
| Popis: | The $^1\mathrm{S}_0$-$^3\mathrm{P}_0$ clock transition frequency $\nu_\text{Sr}$ 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 $\nu_\text{Sr}$ 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 $\alpha$, electron-proton mass ratio $\mu$ 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 $\alpha$ and $\mu$. Comment: Published version. 4 pages, 4 figures |
| Databáze: | arXiv |
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