Results 121 to 130 of about 4,095 (225)

An introduction to cosmology

, 2002
The third edition of this successful textbook is fully updated and includes important recent developments in cosmology. It begins with an introduction to cosmology and general relativity, and goes on to cover the mathematical models of standard cosmology.
Narlikar, Jayant Vishnu
core  

The Principle of Phase Transition Cosmology: The Current Universe Formed by the Evolution of Two-Component Quantum Superfluid

Reports in Advances of Physical Sciences
This paper aims to demonstrate that modern cosmology has overlooked the systematic and holistic aspects of the universe’s evolution. It is based on the notion that the primordial universe comprised a two-component quantum superfluid and a synthesis of ...
Xiaodong Yang, Yuchen Yang, Zhen Luo, Yuanbo Bi   +3 more
doaj   +1 more source

Noncommutative cosmology

, 2018
Modified gravity models play an important role in contemporary theoretical cosmology. The present book proposes a novel approach to the topic based on techniques from noncommutative geometry, especially the spectral action functional as a gravity model ...
Marcolli, Matilde
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Chain inflation revisited

, 2008
This paper represents an in-depth treatment of the chain inflation scenario. We fully determine the evolution of the universe in the model, the conditions necessary in order to have a successful inflationary period, and the matching with the ...
Chialva, Diego,, Danielsson, Ulf H.,
core   +1 more source

An open system approach to gravity

Journal of High Energy Physics
Several major open problems in cosmology — including the nature of inflation, dark matter, and dark energy — share a common structure: they involve spacetime-filling media with unknown microphysics, and can be probed so far only through their ...
Santiago Agüí Salcedo, Thomas Colas, Lennard Dufner, Enrico Pajer   +3 more
doaj   +1 more source

Scalar Fields in Cosmology: Inflation, Dark Matter, Dark Energy

, 2018
During the 12 years of project C6 of the SFB 676 it has achieved a set of significant contributions to our understanding of the dynamics of scalar fields in early universe cosmology and its connection to string theory.
Louis, Jan, Westphal, Alexander
core   +1 more source

Consistency of tachyacoustic cosmology with de Sitter swampland conjectures

, 2019
Recent studies show that there is tension between the de Sitter swampland conjectures proposed by Obeid, et al. and inflationary cosmology. In this paper, we consider an alternative to inflation, tachyacoustic cosmology, in light of swampland conjectures.
Lin, Wei-Chen, Kinney, William H.,
core   +1 more source

Models of quintessential inflation. [PDF]

, 2001
A unified approach to quintessence and inflation is investigated with the use of a single scalar field. It is argued that successful potentials have to approximate a combination of exponential and inverse power-law decline in the limit of large values of
Dimopoulos, Konstantinos
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The Spectre of Underdetermination in Modern Cosmology

Philosophy of Physics
The scientific status of physical cosmology has been the subject of philosophical debate ever since detailed mathematical models of the universe emerged from Einstein’s general theory of relativity.
Pedro G. Ferreira, William J. Wolf, James Read   +2 more
doaj   +1 more source

Inflation and axion cosmology

Physics Letters B, 1988
Abstract It is argued that the standard constraint ƒ⪷10 12 GeV in the axion theory and related constraints in the theories of other weakly interacting scalar fields do not apply in many versions of the inflationary universe scenario.
openaire   +1 more source