30 citations · 32 across the 4 of their papers we have counts for
6 papers
Potentially healthy time evolution in interacting -form fields
Fethi M. Ramazanoğlu, Kıvanç İ. Ünlütürk
It was recently discovered that many self-interacting vector fields can have healthy time evolution when field amplitudes are small, however, further dynamics becomes impossible if…
Underlying mechanisms of phase transitions in scalar-tensor theories
Murat Özinan, Kıvanç İ. Ünlütürk, Fethi M. Ramazanoğlu
Spontaneous scalarization phenomenon in scalar-tensor gravity is known to be a form of phase transition, and it was recently shown that the order of this transition changes dependi…
Aspects of time evolution in -form field theories
Kıvanç İ. Ünlütürk, Fethi M. Ramazanoğlu
We show that higher form fields, specifically 2- and 3-forms in four spacetime dimensions, suffer from loss of hyperbolicity when they have self interaction. The equations of motio…
Loss of hyperbolicity and tachyons in generalized Proca theories
Kıvanç İ. Ünlütürk, Andrew Coates, Fethi M. Ramazanoğlu
Various groups recently demonstrated that the time evolution of simplest self-interacting vector fields, those with self-interaction potentials, can break down after a finite durat…
Generalized disformal coupling leads to spontaneous tensorization
Fethi M. Ramazanoğlu, Kıvanç İ. Ünlütürk
We show that gravity theories involving disformally transformed metrics in their matter coupling lead to spontaneous growth of various fields in a similar fashion to the spontaneou…
Hamilton-Jacobi Formulation of the Thermodynamics of Einstein-Born-Infeld-AdS Black Holes
Tekin Dereli, Kıvanç İ. Ünlütürk
A Hamilton-Jacobi formalism for thermodynamics was formulated by Rajeev [Ann. Phys. 323, 2265 (2008)] based on the contact structure of the odd dimensional thermodynamic phase spac…