Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of absolute transition frequencies of 87Rb to nS and nD
  Rydberg states by means of electromagnetically induced transparency   We report the measurement of absolute excitation frequencies of 87Rb to nS
and nD Rydberg states. The Rydberg transition frequencies are obtained by
observing electromagnetically induced transparency on a rubidium vapor cell.
The accuracy of the measurement of each state is < 1 MHz, which is achieved by
frequency stabilizing the two diode lasers employed for the spectroscopy to a
frequency comb and a frequency comb calibrated wavelength meter, respectively.
Based on the spectroscopic data we determine the quantum defects of 87Rb, and
compare it with previous measurements on 85Rb. We determine the ionization
frequency from the 5S1/2(F=1) ground state of 87Rb to 1010.0291646(3) THz,
providing the binding energy of the ground state with an accuracy improved by
two orders of magnitude.

12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
9
The categories of this paper are: nlin