Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarization of vacuum fluctuations: source of the vacuum permittivity
  and speed of light   There are two types of fluctuations in the quantum vacuum: type 1 vacuum
fluctuations are on shell and can interact with matter in specific, limited
ways that have observable consequences; type 2 vacuum fluctuations are off
shell and cannot interact with matter. A photon will polarize a type 1, bound,
charged lepton-antilepton vacuum fluctuation in much the same manner that it
would polarize a dielectric, suggesting the method used here for calculating
the permittivity $\epsilon_0$ of the vacuum. In a model that retains only
leading terms, $\epsilon_0 \cong (6\mu_0/\pi)(8e^2/\hbar)^2= 9.10\times
10^{-12}$ C/(Vm). The calculated value for $\epsilon_0$ is 2.7\% more than the
accepted value. The permittivity of the vacuum, in turn, determines the speed
$c$ of light in the vacuum. Since the vacuum is at rest with respect to every
inertial frame of reference, $c$ is the same in every inertial reference frame.

17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg