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178 papers · 1 filter
Generalized relative locality and causal sets
Andrea Bevilacqua, Alice Boldrin
In this paper we introduce a new general framework for the study of phenomenological quantum gravity theories (PQG). The key idea is the introduction of two different types of spac…
Finite time pseudo-rip singularity in cosmology
Mariusz P. Dąbrowski, Teodor Borislavov Vasilev
By studying first a new decelerating sudden future singularity (SFS) universe we report finding a novel type of cosmological singularity which we dub a finite time pseudo-rip (FTPR…
Non-Gaussianities as a Signature of Quantumness of Quantum Cosmology
Hervé Bergeron, Przemysław Małkiewicz, Patrick Peter
We show that the consistent application of the rules of quantum mechanics to cosmological systems inevitably results in the so-called multiverse states in which neither the backgro…
Microlensing of long-duration gravitational wave signals originating from Galactic sources
Sudhagar Suyamprakasam, Sreekanth Harikumar, Paweł Ciecieląg +3
Detection of quasi-monochromatic, long-duration (continuous) gravitational wave radiation emitted by, e.g., asymmetric rotating neutron stars in our Galaxy requires a long observat…
On the dynamics of single-vertex states in quantum-reduced loop gravity
Ilkka Mäkinen
In this article we examine a Hamiltonian constraint operator governing the dynamics of simple quantum states, whose graph consists of a single six-valent vertex, in quantum-reduced…
Look beyond additivity and extensivity of entropy for black hole and cosmological horizons
Mariusz P. Dabrowski
We present a comparative analysis of the plethora of nonextensive and/or nonadditive entropies which go beyond the standard Boltzmann-Gibbs formulation. After defining the basic no…