String quantum gravity, Lorentz-invariance violation and gamma ray astronomy

NE Mavromatos - International Journal of modern physics A, 2010 - World Scientific
In the first part of the review, I discuss ways of obtaining Lorentz-Invariance Violating (LIV)
space–time foam in the modern context of string theory, involving brane world scenarios …

Principles of Einstein–Finsler gravity and perspectives in modern cosmology

SI Vacaru - International Journal of Modern Physics D, 2012 - World Scientific
We study the geometric and physical foundations of Finsler gravity theories with metric
compatible connections defined on tangent bundles, or (pseudo) Riemannian manifolds …

Implications of a stochastic microscopic Finsler cosmology

NE Mavromatos, VA Mitsou, S Sarkar… - The European Physical …, 2012 - Springer
Within the context of supersymmetric space-time (D-particle) foam in string/brane-theory, we
discuss a Finsler-induced cosmology and its implications for (thermal) dark matter …

Modified dispersion relations in Hořava–Lifshitz gravity and Finsler brane models

SI Vacaru - General Relativity and Gravitation, 2012 - Springer
We study possible links between quantum gravity phenomenology encoding Lorentz
violations as nonlinear dispersions, the Einstein–Finsler gravity models, EFG, and …

Fractional dynamics from Einstein gravity, general solutions, and black holes

SI Vacaru - International Journal of Theoretical Physics, 2012 - Springer
We study the fractional gravity for spacetimes with non-integer fractional derivatives. Our
constructions are based on a formalism with the fractional Caputo derivative and integral …

Axiomatic formulations of modified gravity theories with nonlinear dispersion relations and Finsler–Lagrange–Hamilton geometry

L Bubuianu, SI Vacaru - The European Physical Journal C, 2018 - Springer
We develop an axiomatic geometric approach and provide an unconventional review of
modified/nonlinear gravity theories, MGTs, with modified dispersion relations, MDRs …

On axiomatic formulation of gravity and matter field theories with MDRs and Finsler-Lagrange-Hamilton geometry on (co) tangent Lorentz bundles

SI Vacaru - arxiv preprint arxiv:1801.06444, 2018 - arxiv.org
We develop an axiomatic geometric approach and provide an unconventional review of
modified gravity theories, MGTs, with modified dispersion relations, MDRs, encoding Lorentz …

CPT-violating leptogenesis induced by gravitational defects

NE Mavromatos, S Sarkar - The European Physical Journal C, 2013 - Springer
We explore leptogenesis induced by the propagation of neutrinos in gravitational
backgrounds that may occur in string theory. The first background is due to linear dilatons …

Fractional almost Kähler–Lagrange geometry

D Baleanu, SI Vacaru - Nonlinear Dynamics, 2011 - Springer
The goal of this paper is to encode equivalently the fractional Lagrange dynamics as a
nonholonomic almost Kähler geometry. We use the fractional Caputo derivative generalized …

[HTML][HTML] Critical remarks on Finsler modifications of gravity and cosmology by Zhe Chang and **n Li

SI Vacaru - Physics Letters B, 2010 - Elsevier
I do not agree with the authors of papers arxiv: 0806.2184 and arxiv: 0901.1023 v1
(published in [Zhe Chang, **n Li, Phys. Lett. B 668 (2008) 453] and [Zhe Chang, **n Li …