Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric field induced hyperfine level-crossings in (nD)Cs at two-step
  laser excitation: experiment and theory   The pure electric field level-crossing of m_F Zeeman sublevels of hyperfine F
levels at two-step laser excitation was described theoretically and studied
experimentally for the nD_3/2 states in Cs with n = 7,9, and 10, by applying a
diode laser in the first 6S_1/2 to 6P_3/2 step and a diode or dye laser for the
second 6P_3/2 to nD_3/2 step. Level-crossing resonance signals were observed in
the nD_3/2 to 6P_1/2 fluorescence. A theoretical model was developed to
describe quantitatively the resonance signals by correlation analysis of the
optical Bloch equations in the case when an atom simultaneously interacts with
two laser fields in the presence of an external dc electric field. The
simulations described well the experimental signals. The tensor
polarizabilities (in Bohr radii cubed) were determined to be 7.45(20) x 10^4
for the 7D_3/2 state and 1.183(35) x 10^6 for the 9D_3/2 state; a well
established tensor polarizability value for 10D_3/2 was used to calibrate the
electric field. The tensor polarizability value for the 7D_3/2 state differed
by ca. 15% from the existing experimentally measured value.

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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat