1.7k citations
- Istanbul Technical UniversityTR55 papers
- Türkiye Bilimsel ve Teknolojik Araştırma KurumuTR46 papers
- Isfahan University of TechnologyIR33 papers
- Massachusetts Institute of TechnologyUS28 papers
- Feza Gürsey InstituteTR27 papers
- Bilkent UniversityTR21 papers
- Boğaziçi UniversityTR20 papers
- Sabancı ÜniversitesiTR17 papers
- University of CambridgeGB13 papers
- Georgia Institute of TechnologyUS12 papers
- Queen's University BelfastGB11 papers
- Bahçeşehir UniversityTR10 papers
80 papers · 1 filter
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…
Non-vacuum metrics for the Newman-Unti-Tamburino background: A coordinate-free approach to diverging and twisting solutions
Ayşe Hümeyra Bilge, Tolga Birkandan, Tekin Dereli +1
The geometry of the Newman-Unti-Tamburino (NUT) vacuum solution is characterized as the unique Petrov Type D vacuum metric such that the two double principal null directions form a…
Non-Hermitian Gravitational Wave Scattering
Burak Pekduran, Mustafa Sarısaman, Ekrem Aydıner
In this study, the non-Hermitian scattering of gravitational waves is examined, and their behavior at spectral singularities is discussed. We investigate the non-Hermitian properti…
Nature of phase transitions and metastability in scalar-tensor theories
Kıvanç İ. Ünlütürk, Semih Tuna, Oğuzhan K. Yamak +1
Compact stars above a critical stellar mass develop large scalar fields in some scalar-tensor theories. This scenario, called spontaneous scalarization, has been an intense topic o…
A coordinate-free approach to obtaining exact solutions in general relativity: The Newman-Unti-Tamburino solution revisited
Emir Baysazan, Ayse Humeyra Bilge, Tolga Birkandan +1
The Newman-Unti-Tamburino (NUT) solution is characterized as the unique Petrov Type vacuum metric such that the two double principal null directions form an integrable distribu…