Special Issue "Origins and Natures of Inflation, Dark Matter and Dark Energy"

A special issue of Universe (ISSN 2218-1997). This special issue belongs to the section "Cosmology".

Deadline for manuscript submissions: 10 June 2022.

Special Issue Editor

Dr. Kazuharu Bamba
E-Mail Website
Guest Editor
Division of Human Support System, Faculty of Symbiotic Systems Science, Fukushima University, Fukushima 960-1296, Japan
Interests: modified theories of gravity; dark energy; cosmology; particle-theory and field-theory models of the early universe; electric and magnetic fields; quantum aspects of black holes, evaporation, thermodynamics
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Special Issue Information

Dear Colleagues,

Exploring the origins of a field to realize inflation, dark matter, and dark energy is one of the most important problems in modern physics and cosmology. The future detection of primordial gravitational waves is strongly expected to reveal the energy scale of inflation in the early universe. Furthermore, there are two possibilities for the origin of dark matter, namely, new particles in particle-theory models beyond the standard model, and astrophysical objects. In addition, two representative studies have been proposed for the true character of dark energy, the existence of which leads to late-time cosmic acceleration. One is to introduce some unknown matter called dark energy with the negative pressure in general relativity. The other is to modify gravity at large scales. The latter is called geometrical dark energy. The main aim of this Special Issue is to understand the origins and true natures of inflation, dark matter, and dark energy. We can consider both phenomenological approaches and more fundamental physics such as higher-dimensional gravity theories, quantum gravity, quantum cosmology, physics in the early universe, quantum field theories and gauge field theories in curved spacetime, string theories, brane world models, and the holographic principle. It is our pleasure to invite submissions to this Special Issue on inflation, dark matter, dark energy, and related foundations of physics.

Prof. Dr. Kazuharu Bamba
Guest Editor

Manuscript Submission Information

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Keywords

  • inflation
  • dark matter
  • dark energy
  • modified gravity
  • cosmology

Published Papers (4 papers)

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Research

Article
Multi-Modal Clustering Events Observed by Horizon-10T and Axion Quark Nuggets
Universe 2021, 7(10), 384; https://0-doi-org.brum.beds.ac.uk/10.3390/universe7100384 - 15 Oct 2021
Viewed by 365
Abstract
The Horizon-10T collaboration have reported observation of Multi-Modal Events (MME) containing multiple peaks suggesting their clustering origin. These events are proven to be hard to explain in terms of conventional cosmic rays (CR). We propose that these MMEs might be result of the [...] Read more.
The Horizon-10T collaboration have reported observation of Multi-Modal Events (MME) containing multiple peaks suggesting their clustering origin. These events are proven to be hard to explain in terms of conventional cosmic rays (CR). We propose that these MMEs might be result of the dark matter annihilation events within the so-called axion quark nugget (AQN) dark matter model, which was originally invented for completely different purpose to explain the observed similarity between the dark and the visible components in the Universe, i.e., ΩDMΩvisible without any fitting parameters. We support this proposal by demonstrating that the observations, including the frequency of appearance, intensity, the spatial distribution, the time duration, the clustering features, and many other properties nicely match the emission characteristics of the AQN annihilation events in atmosphere. We list a number of features of the AQN events which are very distinct from conventional CR air showers. The observation (non-observation) of these features may substantiate (refute) our proposal. Full article
(This article belongs to the Special Issue Origins and Natures of Inflation, Dark Matter and Dark Energy)
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Article
Statefinder and Om Diagnostics for New Generalized Chaplygin Gas Model
Universe 2021, 7(10), 362; https://0-doi-org.brum.beds.ac.uk/10.3390/universe7100362 - 28 Sep 2021
Cited by 1 | Viewed by 326
Abstract
We explore a unified model of dark matter and dark energy. This new model is a generalization of the generalized Chaplygin gas model and is known as a new generalized Chaplygin gas (NGCG) model. We study the evolutions of the Hubble parameter and [...] Read more.
We explore a unified model of dark matter and dark energy. This new model is a generalization of the generalized Chaplygin gas model and is known as a new generalized Chaplygin gas (NGCG) model. We study the evolutions of the Hubble parameter and the distance modulus for the model under consideration and the standard ΛCDM model and compare that with the observational datasets. Furthermore, we demonstrate two geometric diagnostics analyses including the statefinder (r,s) and Om(z) to the discriminant NGCG model from the standard ΛCDM model. The trajectories of evolution for (r,s) and Om(z) diagnostic planes are shown to understand the geometrical behavior of the NGCG model by using different observational data points. Full article
(This article belongs to the Special Issue Origins and Natures of Inflation, Dark Matter and Dark Energy)
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Article
Results of Search for Magnetized Quark-Nugget Dark Matter from Radial Impacts on Earth
Universe 2021, 7(5), 116; https://0-doi-org.brum.beds.ac.uk/10.3390/universe7050116 - 21 Apr 2021
Cited by 1 | Viewed by 471
Abstract
Magnetized quark nuggets (MQNs) are a recently proposed dark-matter candidate consistent with the Standard Model and with Tatsumi’s theory of quark-nugget cores in magnetars. Previous publications have covered their formation in the early universe, aggregation into a broad mass distribution before they can [...] Read more.
Magnetized quark nuggets (MQNs) are a recently proposed dark-matter candidate consistent with the Standard Model and with Tatsumi’s theory of quark-nugget cores in magnetars. Previous publications have covered their formation in the early universe, aggregation into a broad mass distribution before they can decay by the weak force, interaction with normal matter through their magnetopause, and a first observation consistent MQNs: a nearly tangential impact limiting their surface-magnetic-field parameter Bo from Tatsumi’s ~1012+/−1 T to 1.65 × 1012 T +/− 21%. The MQN mass distribution and interaction cross section strongly depend on Bo. Their magnetopause is much larger than their geometric dimensions and can cause sufficient energy deposition to form non-meteorite craters, which are reported approximately annually. We report computer simulations of the MQN energy deposition in water-saturated peat, soft sediments, and granite, and report the results from excavating such a crater. Five points of agreement between observations and hydrodynamic simulations of an MQN impact support this second observation being consistent with MQN dark matter and suggest a method for qualifying additional MQN events. The results also redundantly constrain Bo to ≥ 4 × 1011 T. Full article
(This article belongs to the Special Issue Origins and Natures of Inflation, Dark Matter and Dark Energy)
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Article
Limits on Magnetized Quark-Nugget Dark Matter from Episodic Natural Events
Universe 2021, 7(2), 35; https://0-doi-org.brum.beds.ac.uk/10.3390/universe7020035 - 04 Feb 2021
Cited by 3 | Viewed by 1078
Abstract
A quark nugget is a hypothetical dark-matter candidate composed of approximately equal numbers of up, down, and strange quarks. Most models of quark nuggets do not include effects of their intrinsic magnetic field. However, Tatsumi used a mathematically tractable approximation of the Standard [...] Read more.
A quark nugget is a hypothetical dark-matter candidate composed of approximately equal numbers of up, down, and strange quarks. Most models of quark nuggets do not include effects of their intrinsic magnetic field. However, Tatsumi used a mathematically tractable approximation of the Standard Model of Particle Physics and found that the cores of magnetar pulsars may be quark nuggets in a ferromagnetic liquid state with surface magnetic field Bo = 1012±1 T. We have applied that result to quark-nugget dark matter. Previous work addressed the formation and aggregation of magnetized quark nuggets (MQNs) into a broad and magnetically stabilized mass distribution before they could decay and addressed their interaction with normal matter through their magnetopause, losing translational velocity while gaining rotational velocity and radiating electromagnetic energy. The two orders of magnitude uncertainty in Tatsumi’s estimate for Bo precludes the practical design of systematic experiments to detect MQNs through their predicted interaction with matter. In this paper, we examine episodic events consistent with a unique signature of MQNs. If they are indeed caused by MQNs, they constrain the most likely values of Bo to 1.65 × 1012 T +/− 21% and support the design of definitive tests of the MQN dark-matter hypothesis. Full article
(This article belongs to the Special Issue Origins and Natures of Inflation, Dark Matter and Dark Energy)
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