4 papers
Potentially healthy time evolution in interacting -form fields
Fethi M. RamazanoÄlu, Kıvanç Ä°. Ãnlütürk
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 Ãzinan, Kıvanç Ä°. Ãnlütürk, Fethi M. RamazanoÄlu
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 Ä°. Ãnlütürk, Fethi M. RamazanoÄlu
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…
Crossing the singularity of a gravitational wave collision
Tekin Dereli, Ozay Gurtug, Kıvanç Ä°. Ãnlütürk
A reformulation of general relativity inspired by the Belinski-Khalatnikov-Lifshitz conjecture had been introduced by Ashtekar, Henderson and Sloan which is based on variables clos…