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7 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…
The Filament Rift: CDM's Structural Challenge Against Observation
Saeed Tavasoli, Parsa Ghafour
This study presents the first extended comparison of cosmic filaments identified in SDSS DR10 observations () and the IllustrisTNG300-1 CDM simulation (), utili…
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…
Lorentz Violation with Gravitational Waves: Constraints from NANOGrav and IPTA Data
Alireza Allahyari, Mohammadreza Davari, David F. Mota
We explore a theoretical framework in which Lorentz symmetry is explicitly broken by incorporating derivative terms of the extrinsic curvature into the gravitational action. These…
The effect of thermal misbalance on magnetohydrodynamic modes in coronal magnetic cylinders
S. M. Hejazi, T. Van Doorsselaere, M. Sadeghi +2
This study investigates the dispersion of magnetohydrodynamic waves influenced by thermal misbalance in a cylindrical configuration with a finite axial magnetic field within solar…
Quantum Interference in Atomic Systems
Sajad Ahmadi, Mohsen Akbari, Shahpoor Saeidian +1
Quantum interference takes center stage in the realm of quantum particles, playing a crucial role in revealing their wave-like nature and probabilistic behavior. It relies on the c…