Research

Research

I am a cosmologist, in other words I use physics to study the Universe, how it started and evolved into the structure that we observe around us. It is now an exceptional time for modern cosmology, when we can observe the Universe and connect high precision cosmological measurements with theory. With the evolution of the universe spanning a vast range of energies and scales, cosmological observables can shed light on virtually any particle physics model as well as on any theory of gravity. There is in fact an interplay between particle physics and cosmology, and the deepest questions of these two fields of research are the same. My real passion and interest are in using the array of cosmological data available to us to test fundamental physics. Through the past years I have been involved both in theoretical and observational aspects of this endeavor, with a particular focus on the dynamics of the late-time universe and tests of gravity on cosmological scales. You can find a more detailed overview of the selected research projects in which I have been actively involved over the past years, including the links to the relevant publications.

Interested in working on these topics? Send me an email to inquire about openings in our group!

Overview of selected topics

Exploring the dark universe with Effective Field Theory and CAMB

with B. Hu, M. Raveri and N. Frusciante

A principal component analysis for cosmological tests of gravity

with A. Hojjati, L. Pogosian, G.-B. Zhao, J. Zylberberg, K. Koyama, R. Crittenden

Ref.: Phys. Rev. D 89 (2014) 10, 103530, Phys. Rev. D 90 (2014) 4, 043513 , astro-ph.CO: 1410.5807

Investigating the scale dependence of the dark sector

with L. Pogosian, R. Buniy, A. Hojjati and G.-B. Zhao

Ref.: Phys. Rev. D 87, 104015 (2013), Phys. Rev. D 89 (2014) 8, 083505

Measuring the speed of cosmological GWs with CMB polarization

with M.Raveri, C. Baccigalupi, Y.-S. Zhou

Ref.: Phys. Rev. D 91 (2015) 6, 061501

Scalar radiation from Chameleon shielded regions

Ref.: Phys. Rev. Lett. 106, 251101 (2011)

Exploring consequences of modified growth with CAMB

with A.Hojjati, L.Pogosian, G.-B. Zhao, J. Zylberberg

Ref.: Phys. Rev. D 79, 083513 (2009)