Configuration entropy of the Cosmic Web: Can voids mimic the dark energy?. (arXiv:1901.08475v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Pandey_B/0/1/0/all/0/1">Biswajit Pandey</a>
We propose an alternative physical mechanism to explain the observed
accelerated expansion of the Universe based on the configuration entropy of the
cosmic web and its evolution. We show that the sheets, filaments and clusters
in the cosmic web act as sinks whereas the voids act as the sources of
information. The differential entropy of the cosmic velocity field increases
with time and also acts as a source of entropy. The growth of non-linear
structures and the emergence of the cosmic web may lead to a situation where
the overall dissipation rate of information at the sinks are about to dominate
the generation rate of information from the sources. Consequently, the Universe
either requires a dispersal of the overdense non-linear structures or an
accelerated expansion of the underdense voids to prevent a violation of the
second law of thermodynamics. The dispersal of the sheets, filaments and
clusters are not a viable option due to the attractive nature of gravity but
the repulsive and outward peculiar gravitational acceleration at the voids
makes it easier to stretch them at an accelerated rate. We argue that this
accelerated expansion of the voids inside the cosmic web may mimic the
behaviour of dark energy.
We propose an alternative physical mechanism to explain the observed
accelerated expansion of the Universe based on the configuration entropy of the
cosmic web and its evolution. We show that the sheets, filaments and clusters
in the cosmic web act as sinks whereas the voids act as the sources of
information. The differential entropy of the cosmic velocity field increases
with time and also acts as a source of entropy. The growth of non-linear
structures and the emergence of the cosmic web may lead to a situation where
the overall dissipation rate of information at the sinks are about to dominate
the generation rate of information from the sources. Consequently, the Universe
either requires a dispersal of the overdense non-linear structures or an
accelerated expansion of the underdense voids to prevent a violation of the
second law of thermodynamics. The dispersal of the sheets, filaments and
clusters are not a viable option due to the attractive nature of gravity but
the repulsive and outward peculiar gravitational acceleration at the voids
makes it easier to stretch them at an accelerated rate. We argue that this
accelerated expansion of the voids inside the cosmic web may mimic the
behaviour of dark energy.
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