Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fock-space relativistic coupled-cluster calculation of hyperfine induced
  $\bf {^1S_0 \rightarrow {^3P^o_0}}$ clock transition in Al$^+$   We have developed an all-particle Fock-space relativistic coupled-cluster
method to calculate the properties of two-valence atoms and ions. Using the
method we compute the properties associated with hyperfine induced $^1S_0 -
^3P^o_0$ clock transition in Al$^+$. Our result of the $^3P^o_0$ metastable
state life time, $20.20 \pm 0.91$ s, is in excellent agreement with the
experimental value, $20.60 \pm 1.4$ s [Phys. Rev. Lett. {\bf 98}, 220801
(2007)]. Our studies show that the contributions from the triple excitations,
and the corrections from the Breit interaction and QED effects are essential to
obtain accurate clock properties in Al$^+$.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org