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Nuclear Science and Engineering Associate Professor Nuno Loureiro has spent his first year and a half at MIT’s Plasma Science and Fusion Center (PSFC) exploring the magnetic processes crucial to under...
Isotropy of the early universe from CMB anisotropies
The cosmic microwave radiation cosmological parameters scattering baryon density
2014/12/20
The acoustic peak in the cosmic microwave background power spectrum is sensitive to causal processes and cosmological parameters in the early universe up to the time of last scattering. We provide lim...
Institute of Physics, Pedagogical University, ul. Podchorazych 2, Cracow,Poland, and Copernicus Center for Interdisciplinary Studies, ul. Slawkowska 17, Cracow, Poland
The Distribution of Coalescing Compact Binaries in the Local Universe: Prospects for Gravitational-Wave Observations
Distribution Compact Binaries Local Universe Prospects Gravitational-Wave Observations
2010/12/21
Merging compact binaries are the most viable and best studied candidates for gravitational wave
(GW) detection by the fully operational network of ground-based observatories. In anticipation of the f...
One-loop quantum cosmological correction to the gravitational constant using the kink solution in de Sitter universe
One-loop correction kink energy shape invariance zeta func-tion regularization
2010/12/20
In this paper, we show the equivalence between a classical static scalar field theory and the (closed) de Sitter cosmological model whose potential represents shape invariance property.
One-loop quantum gravity repulsion in the early Universe
one-loop graviton vacuum polarization one-loop graviton self-energy
2010/12/20
Perturbative quantum gravity is used to compute the lowest order corrections to the classical
spatially flat cosmological FLRW solution (for the radiation). The presented approach is analogous to the...
Free Fock space and functional calculus approach to the n-point information about the "Universe"
Free Fock space functional calculus the n-point information
2010/11/16
Starting from a differential equation for the unique field, the equation for the generating vector |V> of the n-point information (correlation and smeared functions) in the free Fock space is derived...
Cosmic microwave background (CMB) radiation is characterized by well-established scales, the 2.7 K temperature of the Planckian spectrum and the 105 amplitude of the temperature anisotropy. ...
Inflation of Bianchi type-$\Rmnum{7}_0$ Universe with Dirac Field in Einstein-Cartan theory
Einstein-Cartan theory Bianchi type-V II0 inflation Dirac field
2010/12/21
We discuss the Bianchi type-V II0 cosmology with Dirac field in Einstein-Cartan the-ory. We obtain the equations of Dirac field and gravitational field in Einstein-Cartan theory. We find a Bianchi typ...
Kerr-de Sitter Universe
2010/12/20
It is now widely accepted that the universe as we understand it is accelerating in expansion and fits the de Sitter model rather well. As such, a realistic assumption of black holes must place them on...
Our starting point is a particular `canvas' aimed to `draw' theories of physics,which has symmetric monoidal categories as its mathematical backbone. In this paper we consider the conceptual foundatio...
Mixmaster universe in the z=3 deformed Hořava-Lifshitz gravity
Hoˇrava-Lifshitz gravity quantum gravity mixmaster universe
2010/3/18
The z=3 deformed Horava-Lifshitz gravity with coupling constants \omega and \epsilon leads to a nonrelativistic "mixmaster" cosmological model. The potential of theory is given by the sum of IR and UV...
Expanding Universe and its manifestations beyond the General Relativity
Expanding Universe General Relativity
2010/3/18
It has been demonstrated that a modern stage of the Universe expansion may be described in accordance with the observations within the scope of the space-time conformal geometry. The clock synchroniza...
We consider the evolution of a flat, isotropic and homogeneous Friedmann-Robertson-Walker Universe, filled with a causal bulk viscous cosmological fluid, that can be characterized by an ultra-relativi...
Stability of the Einstein static universe in modified theories of gravity
Einstein static universe modified theories of gravity
2010/3/17
We present a brief overview of the stability analysis of the Einstein static universe in various modified theories of gravity, like f(R) gravity, Gauss-Bonnet or f(G) gravity, and Horava-Lifshitz grav...