Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetric and antisymmetric constitutive tensors for bi-isotropic and
  bi-anisotropic media   The classical propagation of electromagnetic waves in continuous matter is
described by the constitutive relations and the Maxwell equations. This work
investigates the effects stemming from extended constitutive relations on the
propagation of waves in bi-isotropic and bi-anisotropic media using a classical
general approach, based on the evaluation of dispersion relations and
refractive indices. For the bi-anisotropic media, the magnetoelectric
parameters were represented by specific symmetric and antisymmetric
configurations. The three cases examined have provided real and distinct
refractive indices for two propagating modes, which implies birefringence. The
propagating modes were also carried out in all cases. The anisotropy or
birefringence effect, given by the rotatory power or phase difference, was
evaluated in terms of the magnetoelectric parameters of the theory in each
case. The propagation orthogonal to the vectors used to parametrize the
symmetric and antisymmetric magnetoelectric tensors is described by distinct
modes, which may represent a route to identify the kind of bi-anisotropic
medium examined.

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The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: funct-an