Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Arnold, K. J."'
Autor:
Arnold, K. J., Barrett, M. D.
We present a numerical method for extrapolating polarizability measurements to dc as done in the assessment of blackbody radiation shifts for ion-based clocks. The method explicitly accounts for the frequency dependence of relevant atomic transitions
Externí odkaz:
http://arxiv.org/abs/2409.01476
Autor:
Arnold, K. J., Jayjong, N., Kang, M. L. D., Qichen, Qin, Zhang, Zhao, Zhao, Qi, Barrett, M. D.
We investigate sideband spectroscopy of a trapped ion using a probe laser phase modulated at the trap drive frequency. The enhanced sensitivity of our technique over traditional sideband spectroscopy allows us to detect stray fields of $0.01\,\mathrm
Externí odkaz:
http://arxiv.org/abs/2402.18142
We consider hyperfine-mediated effects for clock transitions in $^{176}$Lu$^+$. Mixing of fine structure levels due to the hyperfine interaction bring about modifications to Land\'e $g$-factors and the quadrupole moment for a given state. Explicit ex
Externí odkaz:
http://arxiv.org/abs/2009.02889
Publikováno v:
Phys. Rev. A 102, 042819 (2020)
Precision measurements of the Lu$^+$ $^3D_1$ and $^3D_2$ quadrupole moments have been carried out giving $\Theta(^3D_1)=0.63862(74)\,e a_0^2$ and $\Theta(^3D_2)=0.8602(14)\,e a_0^2$, respectively. The measurements utilize the differential shift betwe
Externí odkaz:
http://arxiv.org/abs/2008.10196
Publikováno v:
Phys. Rev. A 101, 062515 (2020)
Branching fractions for decays from the $P_{3/2}$ level in $^{138}$Ba$^+$ have been measured with a single laser-cooled ion. Decay probabilities to $S_{1/2}$, $D_{3/2}$ and $D_{5/2}$ are determined to be $0.741716(71)$, $0.028031(23)$ and $0.230253(6
Externí odkaz:
http://arxiv.org/abs/2003.02263
Autor:
Chanu, S. R., Koh, V. P. W., Arnold, K. J., Kaewuam, R., Tan, T. R., Zhang, Zhiqiang, Safronova, M. S., Barrett, M. D.
Publikováno v:
Phys. Rev. A 101, 042507 (2020)
The zero crossing of the dynamic differential scalar polarizability of the $S_{1/2}-D_{5/2}$ clock transition in $^{138}$Ba$^+$ has been determined to be $459.1614(28)\,$THz. Together with previously determined matrix elements and branching ratios, t
Externí odkaz:
http://arxiv.org/abs/1910.09736
Publikováno v:
Phys. Rev. Lett. 124, 083202 (2020)
We propose and experimentally demonstrate a scheme which effects hyperfine averaging during a Ramsey interrogation of a clock transition. The method eliminates the need to average over multiple optical transitions, reduces the sensitivity of the cloc
Externí odkaz:
http://arxiv.org/abs/1910.04983
Autor:
Arnold, K. J., Chanu, S. R., Kaewuam, R., Tan, T. R., Yeo, L., Zhang, Zhiqiang, Safronova, M. S., Barrett, M. D.
Publikováno v:
Phys. Rev. A 100, 032503 (2019)
Measurement of the branching ratios for $6P_{1/2}$ decays to $6S_{1/2}$ and $5D_{3/2}$ in $^{138}$Ba$^+$ are reported with the decay probability from $6P_{1/2}$ to $5D_{3/2}$ measured to be $p=0.268177\pm(37)_\mathrm{stat}-(20)_\mathrm{sys}$. This re
Externí odkaz:
http://arxiv.org/abs/1905.06523
Publikováno v:
Phys. Rev. A 100, 043418 (2019)
It is shown that the dynamic differential scalar polarisability of the $S_{1/2}-D_{5/2}$ transition in $^{138}$Ba$^+$ can be determined to an inaccuracy below $0.5\%$ across a wide wavelength range ($\lambda>700\,\mathrm{nm}$). This can be achieved u
Externí odkaz:
http://arxiv.org/abs/1905.04976
Publikováno v:
Phys. Rev. A 99, 022514 (2019)
High precision spectroscopy of the $^1S_0$-to-${^1}D_2$ clock transition of $^{176}$Lu is reported. Measurements are performed with Hertz level precision with the accuracy of the hyperfine-averaged frequency limited by the calibration of an active hy
Externí odkaz:
http://arxiv.org/abs/1901.04164