Press Release on Dark Energy Research: August-2018

Star Mergers: A New Test Of Gravity, Dark Energy Theories

When scientists recorded a rifle in the coordinate system, followed among 2 seconds by AN associated burst of sunshine discovered by dozens of telescopes around the globe, they’d witnessed, for the primary time, the explosive collision and merger of 2 nucleon stars.

The intense cosmological event discovered on the Gregorian calendar month. seventeen additionally had different reverberations here on Earth: It dominated out a category of dark energy theories that modify gravity and challenged an outsized category of theories. [1]

Dark Energy from Eternal Pair-production of Fermions

We study a toy model within which genus Majorana or Dirac fermions behave because of the supply for a tiny low vacuum energy within the gift Universe. within the model, a self-interacting scalar particle not to mention fermions induces engaging and repulsive interactions between the fermions at the same time. These interactions allow the existence of a constancy state comprised of degenerate fermions with positive energy density. [2]

Dark energy in spherically symmetric universe coupled with Brans-Dicke scalar field

The development of dark energy and its manifestations square measure studied during a spherically isosceles universe considering the Brans-Dicke \cite scalar-tensor theory. within the initial model the dark energy behaves sort of a phantom kind and in such a universe the existence of negative time is valid with a sign that our universe started its evolution before t=0. Dark energy current during this universe is found to be additional active occasionally once alternative kinds of energies stay passive. The second model universe begins with a giant bang and therefore the dark energy contained in it’s found to be substantially relating to temperature change and heating. [3]

Quantum Space and Dark Energy

The accelerated enlargement of the universe is of nice scientific interest. it’s attributed to Dark Energy. We present a quantum theory of space,and a thermodynamic approach to modeling the evolution of the universe, that designate it. the house could be a changing entity created of energy quanta. From wave-particle duality, they’ll even be thought of as a gas. The universe evolved ranging from some extent size volume of gas at terribly heat and pressure. Upon enlargement and cooling, part transitions occurred leading to the formation of basic particles, radiation, and matter; these nucleate and grow into stars, galaxies, and clusters. From a part diagram of cosmic composition, we tend to obtain a correlation between dark energy and therefore the energy of the house. [4]

A Natural Solution to the Dark Energy Problem

Recent observations indicate that the acceleration of our universe enlargement is retardation down, that challenge the quality CDM model. during this article, we have a tendency to show that the existence of particles with fanciful energy density will justify the ascertained retardation down acceleration and supply a whole answer to the origin of dark energy. This model will provide smart agreements with experimental constraints by twenty-eight knowledge from supernovae between redshift z = 0:07 – 2:3. [5]

Reference

[1] Star Mergers: A New Test Of Gravity, Dark Energy Theories

(web link)

[2] Dark Energy from Eternal Pair-production of Fermions

Hashiba J. Dark Energy from Eternal Pair-production of Fermions. arXiv preprint arXiv:1808.06517. 2018 Aug 20. (web link)

[3] Dark energy in spherically symmetric universe coupled with Brans-Dicke scalar field

Singh KM, Samanta GC. Dark energy in spherically symmetric universe coupled with Brans-Dicke scalar field. arXiv preprint arXiv:1808.06772. 2018 Aug 21. (web link)

[4] Quantum Space and Dark Energy

Melendres CA. Quantum Space and Dark Energy. (web link)

[5] A Natural Solution to the Dark Energy Problem

Man Ho Chan1*

1Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong, P.R. China. (web link)

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