Dynamic vacuum variable and equilibrium approach in cosmology

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Dynamic vacuum variable and equilibrium approach in cosmology. / Klinkhamer, Frans; Volovik, Grigory.

julkaisussa: Physical Review D, Vuosikerta 78, Nro 6, 063528, 2008, s. 1-12.

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Klinkhamer, Frans ; Volovik, Grigory. / Dynamic vacuum variable and equilibrium approach in cosmology. Julkaisussa: Physical Review D. 2008 ; Vuosikerta 78, Nro 6. Sivut 1-12.

Bibtex - Lataa

@article{3eff762984fd4f2f88a5237012be5441,
title = "Dynamic vacuum variable and equilibrium approach in cosmology",
abstract = "A modified-gravity theory is considered with a four-form field strength F, a variable gravitational coupling parameter G(F), and a standard matter action. This theory provides a concrete realization of the general vacuum variable q as the four-form amplitude F and allows for a study of its dynamics. The theory gives a flat Friedmann-Robertson-Walker universe with rapid oscillations of the effective vacuum energy density (cosmological “constant”), whose amplitude drops to zero asymptotically. Extrapolating to the present age of the Universe, the order of magnitude of the average vacuum energy density agrees with the observed near-critical vacuum energy density of the present universe. It may even be that this type of oscillating vacuum energy density constitutes a significant part of the so-called cold dark matter in the standard Friedmann-Robertson-Walker framework.",
keywords = "dynamic vacuum, modofied gravity theory, dynamic vacuum, modofied gravity theory, dynamic vacuum, modofied gravity theory",
author = "Frans Klinkhamer and Grigory Volovik",
year = "2008",
doi = "10.1103/PhysRevD.78.063528",
language = "English",
volume = "78",
pages = "1--12",
journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",
issn = "2470-0010",
publisher = "American Physical Society",
number = "6",

}

RIS - Lataa

TY - JOUR

T1 - Dynamic vacuum variable and equilibrium approach in cosmology

AU - Klinkhamer, Frans

AU - Volovik, Grigory

PY - 2008

Y1 - 2008

N2 - A modified-gravity theory is considered with a four-form field strength F, a variable gravitational coupling parameter G(F), and a standard matter action. This theory provides a concrete realization of the general vacuum variable q as the four-form amplitude F and allows for a study of its dynamics. The theory gives a flat Friedmann-Robertson-Walker universe with rapid oscillations of the effective vacuum energy density (cosmological “constant”), whose amplitude drops to zero asymptotically. Extrapolating to the present age of the Universe, the order of magnitude of the average vacuum energy density agrees with the observed near-critical vacuum energy density of the present universe. It may even be that this type of oscillating vacuum energy density constitutes a significant part of the so-called cold dark matter in the standard Friedmann-Robertson-Walker framework.

AB - A modified-gravity theory is considered with a four-form field strength F, a variable gravitational coupling parameter G(F), and a standard matter action. This theory provides a concrete realization of the general vacuum variable q as the four-form amplitude F and allows for a study of its dynamics. The theory gives a flat Friedmann-Robertson-Walker universe with rapid oscillations of the effective vacuum energy density (cosmological “constant”), whose amplitude drops to zero asymptotically. Extrapolating to the present age of the Universe, the order of magnitude of the average vacuum energy density agrees with the observed near-critical vacuum energy density of the present universe. It may even be that this type of oscillating vacuum energy density constitutes a significant part of the so-called cold dark matter in the standard Friedmann-Robertson-Walker framework.

KW - dynamic vacuum

KW - modofied gravity theory

KW - dynamic vacuum

KW - modofied gravity theory

KW - dynamic vacuum

KW - modofied gravity theory

U2 - 10.1103/PhysRevD.78.063528

DO - 10.1103/PhysRevD.78.063528

M3 - Article

VL - 78

SP - 1

EP - 12

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 2470-0010

IS - 6

M1 - 063528

ER -

ID: 3442634