Current challenges in standard cosmology, such as the existence of dark energy, the accelerated expansion of the universe, the inflation paradigm, and related issues, have prompted researchers to propose and develop alternative theories of gravity. There are various approaches to constructing modified th...
Modified gravity theories have the potential of explaining the recent acceleration of the Universe without resorting to the mysterious concept of dark ener
Quantum gravity. Proceedings, International School of Cosmology and Gravitation, 14th Course, Erice, Italy, May 11-19, 1995P.G. BergmannV. de SabbataH.J. Treder
Quantum gravity is the theory that is expected to successfully describe systems that are under strong gravitational effects while at the same time being of an extreme quantum nature. When this principle is applied to the universe as a whole, we use what is commonly named "quantum cosmology". ...
We find no evidence of anomalous neutrino decoherence and determine limits on neutrino–quantum gravity interactions. The constraint on the effective decoherence strength parameter within an energy-independent decoherence model improves on previous limits by a factor of 30. For decoherence effects scaling ...
We analyze the functional integral for quantum conformal gravity and show that, with the help of a Hubbard-Stratonovich transformation, the action can be broken into a local quadratic-curvature theory coupled to a scalar field. A one-loop effective-action calculation reveals t...
Quantum gravity and grand unified field theories and their implications for the very early Big-Bang universe are examined, with an emphasis on interdisciplinary aspects, in a textbook intended for students with elementary knowledge of quantum mechanics and field theory. Chapters are devoted to path in...
Assumption (Q) is manifestly violated by theories that postulate a modification of standard quantum mechanics, such as spontaneous16,17,18,19,20and gravity-induced21,22,23collapse models (cf.24for a review). These deviate from the standard theory already on microscopic scales, although the effect...
Experimental Search for Quantum Gravity Using CosmologyThere are four known fundamental forces in physics: the gravitational, the electromagnetic, the weak and the strong force.doi:10.1007/978-3-319-64537-7_15Manon BischoffVincent Vennin
High Energy Physics - TheoryAstrophysics - Cosmology and Nongalactic AstrophysicsGeneral Relativity and Quantum CosmologyThe holographic dark energy model is obtained from a cosmological constant generated by generic quantum gravity effects giving a minimum length. By contrast, the usual bound for the ...