3 papers
gr-qc2026
First Order Axial Perturbation of the Reissner-Nordström Metric in a Possible Parity-Violating Gravity Background
Abhishek Rout, Brett Altschul
We study axial perturbations of Reissner-Nordström black holes within the general framework of parity-violating modified gravity theories. We derive the governing equations for a…
gr-qc2025
Primordial Gravitational Wave Birefringence in a de Sitter Background with Chern-Simons Coupling
Abhishek Rout, Brett Altschul
In this work, we investigate tensor perturbations in a de Sitter background within the framework of Chern-Simons modified gravity. We introduce transverse-traceless perturbations a…
hep-th2024
Bound States and Particle Production by Breather-Type Background Field Configurations
Abhishek Rout, Brett Altschul
We investigate the interaction of fermion fields with oscillating domain walls, inspired by breather-type solutions of the sine-Gordon equation, a nonlinear system of fundamental i…