Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\mathcal{P}$, $\mathcal{T}$-odd Faraday rotation in intracavity
  absorption spectroscopy with molecular beam as a possible way to improve the
  sensitivity of the search for the time reflection noninvariant effects in
  nature   The present constraint on the space parity ($\mathcal{P}$) and time
reflection invariance ($\mathcal{T}$) violating electron electric dipole moment
($e$EDM) is based on the observation of the electron spin precession in an
external electric field using the ThO molecule. We propose an alternative
approach: observation of the $\mathcal{P}$,~$\mathcal{T}$-odd Faraday effect in
an external electric field using the cavity-enhanced polarimetric scheme in
combination with a molecular beam crossing the cavity. Our theoretical
simulation of the proposed experiment with the PbF and ThO molecular beams
shows that the present constraint on the $e$EDM in principle can be improved by
a few orders of magnitude.

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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: gr-qc