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Various cosmological observations support not only cosmological inflation in the early universe, which is also known as exponential cosmic expansion, but also that the expansion of the late-time universe is accelerating. To explain this phenomenon, the existence of dark energy is proposed. In addition, according to the rotation curve of galaxies, the existence of dark matter, which does not shine, is also suggested. If primordial gravitational waves are detected in the future, the mechanism for realizing inflation can be revealed. Moreover, there exist two main candidates for dark matter. The first is a new particle, the existence of which is predicted in particle physics. The second is an astrophysical object which is not found by electromagnetic waves. Furthermore, there are two representative approaches to account for the accelerated expansion of the current universe. One is to assume the unknown dark energy in general relativity. The other is to extend the gravity theory to large scales. Investigation of the origins of inflation, dark matter, and dark energy is one of the most fundamental problems in modern physics and cosmology. The purpose of this book is to explore the physics and cosmology of inflation, dark matter, and dark energy.
de Sitter vacuum --- n/a --- Einstein-Aether theory of gravity --- Supernovae --- apparatus --- normal galaxies --- higher dimension gauged super-gravity black hole --- dark energy model --- cosmo–particle physics --- instruments --- Cosmic Microwave Background (CMB) temperature --- Dark Energy --- hyper-color --- quantum tunneling phenomenon --- spacetime symmetry --- parametrizations --- quantum gravity --- dynamical Chern–Simons modified gravity --- comparative planetology --- properties of specific particles --- particle physics --- dark matter --- Hawking radiation --- memory --- junction conditions --- cosmology --- composite dark matter --- dosmological parameters --- field theory --- Dark Matter --- cosmological model --- extragalactic objects and systems --- scalar–tensor gravity --- fundamental astronomy --- cosmoligical parameters --- cosmological parameters --- Baryon Acoustic Oscillation (BAO) --- dark atoms --- quantum optical systems --- brans-dicke theory --- dark energy models --- loop quantum cosmology --- dark energy --- galactic rotation curve --- astronomical and space-research instrumentation --- null hypersurfaces --- QCD --- quantum optics --- Hubble constant --- and components common to several branches of physics and astronomy --- statistical analysis --- cosmo-particle physics --- dynamical Chern-Simons modified gravity --- scalar-tensor gravity
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Within the second half of the last century, quantum cosmology concretely became one of the main research lines within gravitational theory and cosmology. Substantial progress has been made. Furthermore, quantum cosmology can become a domain that will gradually develop further over the next handful of decades, perhaps assisted by technological developments. Indications for new physics (i.e., beyond the standard model of particle physics or general relativity) could emerge and then the observable universe would surely be seen from quite a new perspective. This motivates bringing quantum cosmology to more research groups and individuals.This Special Issue (SI) aims to provide a wide set of reviews, ranging from foundational issues to (very) recent advancing discussions. Concretely, we want to inspire new work proposing observational tests, providing an aggregated set of contributions, covering several lines, some of which are thoroughly explored, some allowing progress, and others much unexplored. The aim of this SI is motivate new researchers to employ and further develop quantum cosmology over the forthcoming decades. Textbooks and reviews exist on the present subject, and this SI will complementarily assist in offering open access to a set of wide-ranging reviews. Hopefully, this will assist new interested researchers, in having a single open access online volume, with reviews that can help. In particular, this will help in selecting what to explore, what to read in more detail, where to proceed, and what to investigate further within quantum cosmology.
string cosmology --- quantum cosmology --- Wheeler-DeWitt equation --- loop quantum cosmology --- observations --- classical and quantum cosmology --- time --- quantum fields in curved spacetime --- Brans–Dicke theory --- bounce models --- de Broglie–Bohm interpretation --- quantum geometrodynamics --- extended theories of gravity --- dark energy singularities --- quantum gravity --- Hawking radiation --- entanglement entropy --- uniqueness of the quantization --- polymer quantum mechanics --- bounce --- no-boundary proposal --- instantons --- multiverse --- superspace --- third quantisation --- universe–antiuniverse pair --- weyl curvature hypothesis --- early universe cosmology --- singularity and bounce --- cyclic universe --- quantum fields --- backreaction effects --- supersymmetry --- noncommutativity --- generalized uncertainty principles --- canonical quantum gravity --- clocks --- noether symmetries --- ADM formalism --- exact solutions --- supersymmetric quantum mechanics --- shape invariant potentials --- supersymmetric quantum cosmology --- n/a --- Brans-Dicke theory --- de Broglie-Bohm interpretation --- universe-antiuniverse pair
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