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Loop Quantum Cosmology

Living Reviews in Relativity, 2008
Quantum gravity is expected to be necessary in order to understand situations in which classical general relativity breaks down. In particular in cosmology one has to deal with initial singularities, i.e., the fact that the backward evolution of a ...
Bojowald Martin
doaj  

Loop Quantum Cosmology

Living Reviews in Relativity, 2005
Quantum gravity is expected to be necessary in order to understand situations where classical general relativity breaks down. In particular in cosmology one has to deal with initial singularities, i.e., the fact that the backward evolution of a classical
Bojowald Martin
doaj  

Particle pair creation by inflation of quantum vacuum fluctuations in an ion trap

, 2019
The creation of matter and structure in our universe is currently described by an intricate interplay of quantum field theory and general relativity.
Fey, Christian, Hakelberg, Frederick, Kiefer, Philip, Schaetz, Tobias, Schröder, Jan-Philipp, Schützhold, Ralf, Warring, Ulrich, Wittemer, Matthias   +7 more
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Granice fizyki w kosmologii

Zagadnienia Filozoficzne w Nauce, 2015
The message is that physics has an „outward bound” of scientific inquiry in the field of cosmology. I present it in the historical development. Physics and astronomy, developing since the seventeenth century, inherited from the early Greek philosophers ...
Leszek M. Sokołowski
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Universal Constants, Standard Models and Fundamental Metrology

, 2009
Taking into account four universal constants, namely the Planck's constant $h$, the velocity of light $c$, the constant of gravitation $G$ and the Boltzmann's constant $k$ leads to structuring theoretical physics in terms of three theories each taking ...
Cohen-Tannoudji, G.
core   +1 more source

Unitary evolution and cosmic acceleration in Loop Quantum Cosmology

Physics Letters B
Loop quantum cosmology was shown to interpolate between de Sitter and FLRW Universe phases through a bounce by including Euclidean and Lorentzian terms of the Hamiltonian constraint with weight one -that corresponding to classical General Relativity ...
Omar Gallegos, Tonatiuh Matos, Hugo A. Morales-Técotl   +2 more
doaj   +1 more source

Relational Motivation for Conformal Operator Ordering in Quantum Cosmology

, 2009
Operator-ordering in quantum cosmology is a major as-yet unsettled ambiguity with not only formal but also physical consequences. We determine the Lagrangian origin of the conformal invariance that underlies the conformal operator-ordering choice in ...
Anderson, Edward
core   +1 more source

Non-singular bounce scenarios in loop quantum cosmology and the effective field description

, 2014
A non-singular bouncing cosmology is generically obtained in loop quantum cosmology due to non-perturbative quantum gravity effects. A similar picture can be achieved in standard general relativity in the presence of a scalar field with a non-standard ...
Cai, Yi-Fu, Wilson-Ewing, Edward
core   +1 more source

Matematyka i kosmologia

Zagadnienia Filozoficzne w Nauce, 2012
The mathematical and cosmological works of a group associated with the Copernicus Center for Interdisciplinary Studies in Cracow are summarized. The group consists mainly of M. Heller, L. Pysiak, W. Sasin, Z. Odrzygóźdź and J. Gruszczak.
Michał Heller
doaj  

Bogolyubov Quasiparticles in Constrained Systems

, 1999
The paper is devoted to the formulation of quantum field theory for an early universe in General Relativity considered as the Dirac general constrained system.
Bogoliubov N N, Chernikov N A, Dirac P A M, Dirac P A M, Faddeev L D, Grib A A, Gyngazov L N, Henneaux M, Hoyle F, Kodama H, Kuchar K, Lichnerowicz A, Maxwell J C, Narlikar J V, Penrose R, Pervushin V N, Pervushin V N, Review of particle physics Olive K A, V I Smirichinski, V N Pervushin, Vladimirov Yu S, Weyl H, Zel'dovich Ya B, Zelmanov A L, Zelmanov A L   +24 more
core   +2 more sources