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Matter Universe
Extrapolating the measured mass density of the universe to near a time when the universe’s mass converged 13.7 BYA, suggests temperatures and...
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Lorentzian Robin Universe
In this paper, we delve into the gravitational path integral of Gauss-Bonnet gravity in four spacetime dimensions, in the mini-superspace...
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On the Accelerated Expansion of the Universe
AbstractIf we look from a quantum perspective, the most natural way in which the universe can be created is in entangled pairs whose time flow is...
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Universe inflation and nonlinear electrodynamics
We analyse the inflation of the universe when the source of gravity is electromagnetic fields obeying nonlinear electrodynamics, with two parameters...
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Amended FRW universe: thermodynamics and heat engine
Thermodynamics of non-flat Amended Friedmann–Robertson–Walker (AFRW) universe with cosmological constant as thermodynamic pressure is studied. The...
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Is the Universe in a Mixed State?
Quantum mechanics with a fundamental density matrix has been proposed and discussed recently. Moreover, it has been conjectured that the universe is...
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New Forms of Matter in the Universe
AbstractA review of the development of our ideas about new forms of matter in the Universe is presented.
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Symmetry-based study and dynamics of casual bulk viscous matter-dominated universe
The dynamics of cosmological expansion is studied for a spatially flat matter-dominated universe filled with barotropic casual bulk viscous fluid....
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Spontaneous collapse models lead to the emergence of classicality of the Universe
Assuming that Quantum Mechanics is universal and that it can be applied over all scales, then the Universe is allowed to be in a quantum...
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Overlap reduction function for pulsar timing arrays in an expanding Universe
Since it was confirmed two decades ago that the expansion of the Universe is accelerating, it would be of theoretical interests to figure out what is...
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The Dark Universe
Cosmic Microwave Background (CMB) observations, interpreted within the context of General Relativity, indicate that visible matter, i.e., stars and...
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What Does the Hubble Flow Look Like in an Anisotropic Universe?
AbstractUsing the formulae for light propagation, redshift, and photometric distance in an anisotropic flat universe of Bianchi type I, we construct...
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Inflationary quantum spectrum of the quasi-isotropic Universe
We investigate the quantum dynamics of the quasi-isotropic inflationary solution. This is achieved by deriving the Lagrangian and Hamiltonian for...
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Quantum Black Holes in the Expanding Universe
AbstractIn the expanding Universe, the evolution of quantum black holes with modified Schwarzschild and Reissner–Nordström geometries is considered....
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Viscous effect in the late time evolution of phantom universe
We investigate the cosmological implications of a phantom dark energy model with bulk viscosity. We explore this model as a possible way to resolve...
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Redshift Drift in the Universe: Theoretical Features and Observational Constraints
AbstractWe investigate an exact Universe model which is observationally viable and filled with a binary mixture of a perfect fluid and the...
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On Efforts to Decouple Early Universe Cosmology and Quantum Gravity Phenomenology
The Big Bang singularity in standard model cosmology suggests a program of study in ‘early universe’ quantum gravity phenomenology. Inflation is...
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Squeezed Thermal State Representation of the Inflaton and Particle Production in Bianchi Type-I Universe
AbstractWe use a single-mode squeezed thermal vacuum state formalism and examine the nature of a massive homogeneous scalar field minimally coupled...
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Quantum Brownian motion induced by a scalar field in Einstein’s universe
The Brownian motion of a point particle induced by quantum vacuum fluctuations of a massless real scalar field in Einstein’s universe is studied. By...
