Is Dark Energy From Cosmic Hawking Radiation?

Lee, Jae-Weon; Kim, Hyeong-Chan; Lee, Jungjai

doi:10.1142/s0217732310032469

Cited by 11 publications

(18 citation statements)

References 75 publications

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“…If the element has a macroscopic size, the box should also be chosen to be macroscopic however dense the elements are. Examples are a scalar dark matter model [20,21] and the case of a cosmic Hawking radiation [22,23]. In these cases, the de Broglie wavelengths of the elements are long.…”

Section: Summary and Discussionmentioning

confidence: 99%

Equation of state in the presence of gravity

Kim

Kang

2016

Journal of the Korean Physical Society

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We investigate how an equation of state for matter is affected when a gravity is present. For this purpose, we consider a box of ideal gas in the presence of Newtonian gravity. In addition to the ordinary thermodynamic quantities, a characteristic variable that represents a weight per unit area relative to the average pressure is required in order to describe a macroscopic state of the gas. Although the density and the pressure are not uniform due to the presence of gravity, the ideal gas law itself is satisfied for the thermodynamic quantities when averaged over the system. Assuming that the system follows an adiabatic process further, we obtain a new relation between the averaged pressure and density, which differs from the conventional equation of state for the ideal gas in the absence of gravity. Applying our results to a small volume in a Newtonian star, however, we find that the conventional one is reliable for most astrophysical situations when the characteristic scale is small. On the other hand, gravity effects become significant near the surface of a Newtonian star.

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Section: Summary and Discussionmentioning

confidence: 99%

Equation of state in the presence of gravity

Kim

Kang

2016

Journal of the Korean Physical Society

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“…For an observer in an expanding universe there is a maximum volume that can be observed, since beyond the Hubble distance the velocity of recession is greater than the speed of light and the redshift is infinite: this is the Hubble volume. Its boundary is similar to the event horizon of a black hole [18] because it marks a boundary to what can be observed. This means that it is reasonable to assume that Hawking radiation is emitted at this boundary both outwards and inwards to conserve energy, and any wavelength that does not fit exactly within this size cannot be allowed for the inwards radiation, and therefore also for the outwards radiation.…”

Section: Gravity From the Hscementioning

confidence: 66%

A Toy Cosmology Using a Hubble-Scale Casimir Effect

McCulloch

2014

Galaxies

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The visible mass of the observable universe agrees with that needed for a flat cosmos, and the reason for this is not known. It is shown that this can be explained by modelling the Hubble volume as a black hole that emits Hawking radiation inwards, disallowing wavelengths that do not fit exactly into the Hubble diameter, since partial waves would allow an inference of what lies outside the horizon. This model of "horizon wave censorship" is equivalent to a Hubble-scale Casimir effect. This incomplete toy model is presented to stimulate discussion. It predicts a minimum mass and acceleration for the observable universe which are in agreement with the observed mass and acceleration, and predicts that the observable universe gains mass as it expands and was hotter in the past. It also predicts a suppression of variation on the largest cosmic scales that agrees with the low-l cosmic microwave background anomaly seen by the Planck satellite.

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“…During the preparation of this paper we be became aware of a publication entitled: "Is dark energy from cosmic Hawking radiation?" [27] that relates w = −1 dark energy to observerdependent Hawking radiation. However, those authors do not clearly specify which horizon they are referring to.…”

Section: Background Related Readingmentioning

confidence: 99%

The emergence of gravity as a retro-causal post-inflation macro-quantum-coherent holographic vacuum Higgs-Goldstone field

Sarfatti

Levit

2009

J. Phys.: Conf. Ser.

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We present a model for the origin of gravity, dark energy and dark matter: Dark energy and dark matter are residual pre-inflation false vacuum random zero point energy (w = −1) of largescale negative, and short-scale positive pressure, respectively, corresponding to the "zero point" (incoherent) component of a superfluid (supersolid) ground state. Gravity, in contrast, arises from the 2nd order topological defects in the post-inflation virtual "condensate" (coherent) component. We predict, as a consequence, that the LHC will never detect exotic real onmass-shell particles that can explain dark matter ΩDM ≈ 0.23. We also point out that the future holographic dark energy de Sitter horizon is a total absorber (in the sense of retro-causal Wheeler-Feynman action-at-a-distance electrodynamics) because it is an infinite redshift surface for static detectors. Therefore, the advanced Hawking-Unruh thermal radiation from the future de Sitter horizon is a candidate for the negative pressure dark vacuum energy.

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Is Dark Energy From Cosmic Hawking Radiation?

Cited by 11 publications

References 75 publications

Equation of state in the presence of gravity

Equation of state in the presence of gravity

A Toy Cosmology Using a Hubble-Scale Casimir Effect

The emergence of gravity as a retro-causal post-inflation macro-quantum-coherent holographic vacuum Higgs-Goldstone field

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