Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vacuum Energy: Myths and Reality   We discuss the main myths related to the vacuum energy and cosmological
constant, such as: ``unbearable lightness of space-time''; the dominating
contribution of zero point energy of quantum fields to the vacuum energy;
non-zero vacuum energy of the false vacuum; dependence of the vacuum energy on
the overall shift of energy; the absolute value of energy only has significance
for gravity; the vacuum energy depends on the vacuum content; cosmological
constant changes after the phase transition; zero-point energy of the vacuum
between the plates in Casimir effect must gravitate, that is why the zero-point
energy in the vacuum outside the plates must also gravitate; etc. All these and
some other conjectures appear to be wrong when one considers the thermodynamics
of the ground state of the quantum many-body system, which mimics macroscopic
thermodynamics of quantum vacuum. In particular, in spite of the ultraviolet
divergence of the zero-point energy, the natural value of the vacuum energy is
comparable with the observed dark energy. That is why the vacuum energy is the
plausible candidate for the dark energy.

18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs