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- W4381888443 abstract "We present improved constraints on the coupling of ultralight bosonic dark matter to photons based on long-term measurements of two optical frequency ratios. In these optical clock comparisons, we relate the frequency of the ${}^2S_{1/2} (F=0)leftrightarrow {}^2F_{7/2} (F=3)$ electric-octupole (E3) transition in $^{171}$Yb$^{+}$ to that of the ${}^2S_{1/2} (F=0)leftrightarrow ,{}^2D_{3/2} (F=2)$ electric-quadrupole (E2) transition of the same ion, and to that of the ${}^1S_0leftrightarrow,{}^3P_0$ transition in $^{87}$Sr. Measurements of the first frequency ratio $nu_textrm{E3}/nu_textrm{E2}$ are performed via interleaved interrogation of both transitions in a single ion. The comparison of the single-ion clock based on the E3 transition with a strontium optical lattice clock yields the second frequency ratio $nu_textrm{E3}/nu_textrm{Sr}$. By constraining oscillations of the fine-structure constant $alpha$ with these measurement results, we improve existing bounds on the scalar coupling $d_e$ of ultralight dark matter to photons for dark matter masses in the range of about $ 10^{-24}-10^{-17},textrm{eV}/c^2$. These results constitute an improvement by more than an order of magnitude over previous investigations for most of this range. We also use the repeated measurements of $nu_textrm{E3}/nu_textrm{E2}$ to improve existing limits on a linear temporal drift of $alpha$ and its coupling to gravity." @default.
- W4381888443 created "2023-06-25" @default.
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- W4381888443 date "2023-06-22" @default.
- W4381888443 modified "2023-10-18" @default.
- W4381888443 title "Improved Limits on the Coupling of Ultralight Bosonic Dark Matter to Photons from Optical Atomic Clock Comparisons" @default.
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- W4381888443 doi "https://doi.org/10.1103/physrevlett.130.253001" @default.
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