Holographic Foam Cosmology: From the Late to the Early Universe

Quantum fluctuations endow spacetime with a foamy texture. The degree of foaminess is dictated by black hole physics to be of the holographic type. Applied to cosmology, the holographic foam model predicts the existence of dark energy with critical energy density in the current (late) universe, the quanta of which obey infinite statistics. Furthermore, we use the deep similarities between turbulence and the spacetime foam phase of strong quantum gravity to argue that the early universe was in a turbulent regime when it underwent a brief cosmic inflation with a “graceful” transition to a laminar regime. In this scenario, both the late and the early cosmic accelerations have their origins in spacetime foam.

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Using Lorentz Violation for Early Universe GW Generation Due to Black Hole Destruction in the Early Universe as by Freeze

10.20944/preprints202104.0657.v1 ◽

2021 ◽

Author(s):

Andrew W Beckwith

Keyword(s):

Black Holes ◽

Black Hole ◽

Dark Energy ◽

Early Universe ◽

Physical Mechanism ◽

Lorentz Violation ◽

Graviton Mass ◽

Work Done ◽

Momentum Relation

We are using information from a paper deriving a Lorentz-violating energy-momentum relation entailing an exact mo_mentum cutof as stated by G. Salesi . Salesi in his work allegedly defines Pre Planckian physics, whereas we restrict our given application to GW generation and DE formation in the first 10^-39s to 10^-33s or so seconds in the early universe. This procedure is inacted due to an earlier work whereas referees exhibited puzzlement as to the physical mechanism for release of Gravitons in the very early universe. The calculation is meant to be complementary to work done in the Book “Dark Energy” by M. Li, X-D. Li, and Y. Wang, and also a calculation for Black hole destruction as outlined by Karen Freeze, et. al. The GW generation will be when there is sufficient early universe density so as to break apart Relic Black holes but we claim that this destruction is directly linked to a Lorentz violating energy-momentum G. Salesi derived, which we adopt, with a mass m added in the G. Salesi energy momentum results proportional to a tiny graviton mass, times the number of gravitons in the first 10^-43 seconds

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SPACETIME FOAM

International Journal of Modern Physics D ◽

10.1142/s0218271802002931 ◽

2002 ◽

Vol 11 (10) ◽

pp. 1585-1590 ◽

Cited By ~ 23

Author(s):

Y. JACK NG

Keyword(s):

Black Holes ◽

Black Hole ◽

Black Hole Physics ◽

Atom Interferometry ◽

Holographic Principle ◽

Experimental Result ◽

Semiclassical Gravity ◽

Spacetime Foam ◽

Spacetime Fluctuations

Spacetime is composed of a fluctuating arrangement of bubbles or loops called spacetime foam, or quantum foam. We use the holographic principle to deduce its structure, and show that the result is consistent with gedanken experiments involving spacetime measurements. We propose to use laser-based atom interferometry techniques to look for spacetime fluctuations. Our analysis makes it clear that the physics of quantum foam is inextricably linked to that of black holes. A negative experimental result, therefore, might have non-trivial ramifications for semiclassical gravity and black hole physics.

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Dark Matter and Dark Energy in the Universe

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v14i1.7164 ◽

2018 ◽

Vol 14 (1) ◽

pp. 5292-5295

Author(s):

Yuanjie Li ◽

Lihong Zhang ◽

Peng Dong

Keyword(s):

Black Hole ◽

Dark Matter ◽

Dark Energy ◽

Early Universe ◽

Left Behind ◽

Time Quantum ◽

The Universe

This paper points out that not only all quantum-ghost puzzles occur in the Time Quantum Worm Hole, but also the dark matter in the universe is hidden in it. Dark energy is the contribution of the Planck black hole left behind by the early universe.

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Entropy and Gravitation—From Black Hole Computers to Dark Energy and Dark Matter

Entropy ◽

10.3390/e21111035 ◽

2019 ◽

Vol 21 (11) ◽

pp. 1035 ◽

Cited By ~ 2

Author(s):

Y. Ng

Keyword(s):

Black Hole ◽

Dark Matter ◽

Dark Energy ◽

Cosmological Constant ◽

Black Hole Entropy ◽

Dark Sector ◽

Dark Matter Search ◽

Particle Phenomenology ◽

Back Door ◽

Spacetime Foam

We show that the concept of entropy and the dynamics of gravitation provide the linchpin in a unified scheme to understand the physics of black hole computers, spacetime foam, dark energy, dark matter and the phenomenon of turbulence. We use three different methods to estimate the foaminess of spacetime, which, in turn, provides a back-door way to derive the Bekenstein-Hawking formula for black hole entropy and the holographic principle. Generalizing the discussion for a static spacetime region to the cosmos, we find a component of dark energy (resembling an effective positive cosmological constant of the correct magnitude) in the current epoch of the universe. The conjunction of entropy and gravitation is shown to give rise to a phenomenological model of dark matter, revealing the natural emergence, in galactic and cluster dynamics, of a critical acceleration parameter related to the cosmological constant; the resulting mass profiles are consistent with observations. Unlike ordinary matter, the quanta of the dark sector are shown to obey infinite statistics. This property of dark matter may lead to some non-particle phenomenology and may explain why dark matter particles have not been detected in dark matter search experiments. We also show that there are deep similarities between the problem of “quantum gravity” (more specifically, the holographic spacetime foam) and turbulence.

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Dark Matter and Dark Energy Induced by Condensates

Advances in High Energy Physics ◽

10.1155/2016/8089142 ◽

2016 ◽

Vol 2016 ◽

pp. 1-10 ◽

Cited By ~ 10

Author(s):

Antonio Capolupo

Keyword(s):

Dark Matter ◽

Dark Energy ◽

Vacuum Energy ◽

Critical Energy ◽

Vacuum Condensate ◽

Curved Space ◽

Critical Energy Density ◽

The Universe ◽

Cosmic Microwave Radiation ◽

Thermal States

It is shown that the vacuum condensate induced by many phenomena behaves as a perfect fluid which, under particular conditions, has zero or negative pressure. In particular, the condensates of thermal states of fields in curved space and of mixed particles have been analyzed. It is shown that the thermal states with the cosmic microwave radiation temperature and the Unruh and the Hawking radiations give negligible contributions to the critical energy density of the universe, while the thermal vacuum of the intercluster medium could contribute to the dark matter, together with the vacuum energy of fields in curved space-time and of mixed neutrinos. Moreover, a component of the dark energy can be represented by the vacuum of axion-like particles mixed with photons and superpartners of neutrinos. The formal analogy among the systems characterized by the condensates can open new scenarios in the possibility of detecting the dark components of the universe in table top experiments.

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Feeding and feedback from little monsters: AGN in dwarf galaxies

Proceedings of the International Astronomical Union ◽

10.1017/s1743921320002240 ◽

2020 ◽

Vol 15 (S359) ◽

pp. 238-242

Author(s):

Mar Mezcua

Keyword(s):

Black Holes ◽

Black Hole ◽

Early Universe ◽

Dwarf Galaxies ◽

Scaling Relations ◽

Strong Impact ◽

Hole Formation ◽

Intermediate Mass ◽

Black Hole Formation ◽

Low Mass

AbstractDetecting the seed black holes from which quasars formed is extremely challenging; however, those seeds that did not grow into supermassive should be found as intermediate-mass black holes (IMBHs) of 100 – 105 M⊙ in local dwarf galaxies. The use of deep multiwavelength surveys has revealed that a population of actively accreting IMBHs (low-mass AGN) exists in dwarf galaxies at least out to z ˜3. The black hole occupation fraction of these galaxies suggests that the early Universe seed black holes formed from direct collapse of gas, which is reinforced by the possible flattening of the black hole-galaxy scaling relations at the low-mass end. This scenario is however challenged by the finding that AGN feedback can have a strong impact on dwarf galaxies, which implies that low-mass AGN in dwarf galaxies might not be the untouched relics of the early seed black holes. This has important implications for seed black hole formation models.

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