1.4k citations
- Institute for Research in Fundamental SciencesIR35 papers
- Sharif University of TechnologyIR12 papers
- Farhangian UniversityIR8 papers
- Payame Noor UniversityIR7 papers
- University of TehranIR6 papers
- Tarbiat Modares UniversityIR5 papers
- Centre National de la Recherche ScientifiqueFR4 papers
- National University of Sciences and TechnologyPK4 papers
- Shiraz UniversityIR4 papers
- Amirkabir University of TechnologyIR3 papers
- Institute for Advanced Studies in Basic SciencesIR3 papers
- K. N. Toosi University of TechnologyIR3 papers
18 papers · 1 filter
Photon decaying in de Sitter universe
Y. Ahmadi, M. V. Takook
The interaction between three photons is studied in de Sitter ambient space formalism. As a special case the half harmonic generator is considered, {\it i.e.} one photon decays to…
Constraining Cubic Curvature Corrections to General Relativity with Quasi-Periodic Oscillations
Alireza Allahyari, Liang Ma, Shinji Mukohyama +1
We investigate observational constraints on cubic curvature corrections to general relativity by analyzing quasi-periodic oscillations (QPOs) in accreting black hole systems. In pa…
Testing loop quantum gravity by quasi-periodic oscillations: rotating blackholes
Jafar Khodagholizadeh, Ghadir Jafari, Alireza Allahyari +1
We investigate a compelling model of a rotating black hole that is deformed by the effects of loop quantum gravity (LQG). We present a simplified metric and explore two distinct ge…
Testing No slip model with pulsar timing arrays: NANOGrav and IPTA
Mohammadreza Davari, Alireza Allahyari, Shahram Khosravi
We perform an observational study of modified gravity considering a potential inflationary interpretation of pulsar timing arrays (PTA). We use a motivated model known as no slip i…
Polarization tensor in de Sitter gauge gravity
R. Raziani, M. V. Takook
The gauge theory of the de Sitter group, SO, in the ambient space formalism has been considered in this article. This method is essential to constructing the de Sitter super…
Conceptual and technical challenges of quantum gravity
M. V. Takook
The appearance of infinity together with collapsing quantum state due to the observation or interaction, which are two challenging features of quantum field theory, become very ser…