92 citations · 326 across the 8 of their papers we have counts for
8 papers
Phase transition structure of scalarized neutron stars: the effect of rotation and linear coupling
Kalin V. Staykov, Fethi M. Ramazanoğlu, Daniela D. Doneva +1
There has been a recent revival in understanding the spontaneous scalarization phenomenon in scalar-tensor gravity as a phase transition. Using the tools of the Landau theory, we n…
Spontaneous tensorization from curvature coupling and beyond
Fethi M. Ramazanoğlu
We generalize the recently introduced extended scalar-tensor-Gauss-Bonnet (ESTGB) theories and their close relatives to include spontaneous growth of nonscalar fields such as vecto…
Jordan frame beyond scalar-tensor theories
Fethi M. Ramazanoğlu
We study the Jordan frame formulation of generalizations of scalar-tensor theories conceived by replacing the scalar with other fields such as vectors. The generic theory in this f…
Spontaneous growth of gauge fields in gravity through the Higgs mechanism
Fethi M Ramazanoğlu
We introduce gravity theories featuring spontaneously growing gauge fields where the growth is due to the Higgs mechanism. The underlying physics is inspired by the spontaneous sca…
Spontaneous growth of spinor fields in gravity
Fethi M Ramazanoğlu
We show that spinor fields nonminimally coupled to gravity can grow spontaneously in the presence of matter. We name this phenomenon spontaneous spinorization after the spontaneous…
Spontaneous growth of vector fields in gravity
Fethi M. Ramazanoğlu
We show that the spontaneous scalarization scenario in scalar-tensor theories is a specific case of a more general phenomenon. The key fact is that the instability causing the spon…
Conformal Thin-Sandwich Solver for Generic Initial Data
William E. East, Fethi M. Ramazanoğlu, Frans Pretorius
We present a new scheme for constructing initial data for the Einstein field equations using the conformal thin-sandwich formulation that does not assume conformal flatness or appr…
Evaporation of 2-Dimensional Black Holes
Abhay Ashtekar, Frans Pretorius, Fethi M. Ramazanoğlu
We present a detailed analysis of results from a new study of the quantum evaporation of Callan-Giddings-Harvey-Strominger (CGHS) black holes within the mean-field approximation. T…