3 papers
gr-qc2026
Constraining inflationary models via de-Sitterization of Bianchi Cosmologies
Apurba Samanta, Rahul Kothari
Our Universe is isotropic and homogeneous when we observe it on Mpc length scales. It is desirable that present state of the Universe has no dependence on its initial geo…
astro-ph.CO2026
Constraining Lorentz Violation using 21cm and CMB Cross Correlations
Bhuwan Joshi, Rahul Kothari, Shyam Chaudhary
Lorentz symmetry is a fundamental pillar of modern Physics, yet high-energy theories often predict its violation. One potential signature of such a violation is cosmic birefringenc…
astro-ph.CO2025
Constraining Statistical Isotropy using 21cm Power Spectrum and Bispectrum
Bhuwan Joshi, Rahul Kothari
The Cosmological Principle states that the universe is statistically isotropic and homogeneous on large length scales, typically Mpc. A detection of significant deviati…