3 papers
astro-ph.CO2026
Constraining Scale-Dependent Growth in Gravity with Future 21 cm Surveys
Apurba Samanta, Bhuwan Joshi, Jess Worsley +2
Recent observations, particularly from DESI, have provided intriguing hints of dynamical behaviour in late-time dark energy. Modified gravity theories offer a compelling framework…
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…