Physics – Atomic Physics
Scientific paper
2007-02-06
Current Topic in Atomic, Molecular and Optical Physics, Ed. C. Sinha and S. S. Bhattacharyya, World Scientific, Singapore, (20
Physics
Atomic Physics
TC-2005 Conference, India, 2 EPS figures, Latex 2e
Scientific paper
Demands from several areas of science and technology have lead to a worldwide search for accurate optical clocks with an uncertainty of 1 part in $10^{18}$, which is $10^{3}$ times more accurate than the present day cesium atomic clocks based on microwave frequency regime. In this article we discuss the electric quadrupole and the hyperfine shifts in the $5s ^{2}S_{1/2}\longrightarrow4d ^{2}D_{5/2}$ clock transition in $\mathrm{Sr^{+}}$, one of the most promising candidates for next generation optical clocks. We have applied relativistic coupled cluster theory for determining the electric quadrupole moment of the $4d ^{2}D_{5/2}$ state of $\mathrm{^{88}Sr^{+}}$ and the magnetic dipole ($A$) and electric quadrupole ($B$) hyperfine constants for the $5s ^{2}S_{1/2}$ and $4d ^{2}D_{5/2}$ states which are important in the study of frequency standards with $\mathrm{Sr^{+}}$. The effects of electron correlation which are very crucial for the accurate determination of these quantities have been discussed.
Chaudhuri Rajat K.
Das Bhanu Pratap
Latha K. V. P.
Mukherjee Debashis
Sur Chiranjib
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