230 citations · 853 across the 30 of their papers we have counts for
6 papers · 1 filter
A novel non-perturbative approach to String Cosmology
Jean Alexandre, Nick E. Mavromatos
We develop an exact functional method applied to the bosonic string on a shperical world sheet, in graviton and dilaton backgrounds, consistent with conformal invariance. In this m…
String cosmology from a novel renormalization perspective
Jean Alexandre, Nick E. Mavromatos
We study small perturbations around the exactly marginal time-dependent string configuration of [1], and demonstrate the lack of the appropriate linearization. This implies that th…
An Alternative to Exact Renormalization and Cosmological Solutions in String Theory
Jean Alexandre, Nick E. Mavromatos
In this work we review the application of a functional method, serving as an alternative to the Wilsonian Exact Renormalization approach, to stringy bosonic -models with metric…
CPT Violation: Theory and Phenomenology
Nick E. Mavromatos
Invariance under the combined transformations of CPT (in any order) is guaranteed in Quantum Field Theory in flat space times due to a basic theorem (CPT Theorem). The currently us…
Induced Curvature in Brane Worlds by Surface Terms in String Effective Actions with Higher-Curvature Corrections
Nick E. Mavromatos, Eleftherios Papantonopoulos
In string-inspired effective actions, representing the low-energy bulk dynamics of brane/string theories, the higher-curvature ghost-free Gauss-Bonnet combination is obtained by lo…
Liouville Cosmology
John Ellis, N. E. Mavromatos, D. V. Nanopoulos
Liouville string theory is a natural framework for discussing the non-equilibrium evolution of the Universe. It enables non-critical strings to be treated in mathematically consist…