In a nutshell

My name is Dhiraj Kumar Hazra; by profession I am a physicist .

I am currently a faculty member at the Institute of Mathematical Sciences, Chennai, India. I am an associate of the INAF - Osservatorio di astrofisica e scienza dello spazio, Bologna, Italy. My works mainly can be categorized as the study of origin and evolution of cosmological perturbations from the earliest time till today.

Analysis of observational data -- developing codes to solve theories -- comparison of theory with the data, these three summarize what I do.

Academic history

Faculty, Institute of Mathematical Sciences, Chennai, India, 2020 - present
Marie Skłodowska-Curie Astrofit fellow, INAF - Osservatorio di astrofisica e scienza dello spazio di Bologna, Italy, 2019-2020
INFN fellow, Istituto Nazionale Di Fisica Nucleare, Bologna, Italy, 2017-2019
Mentor: Prof. Fabio Finelli
PCCP fellow, Laboratoire APC - PCCP, Université Paris Diderot, Paris, France, 2015-2017
Mentor: Prof. George F. Smoot
Post-doctoral fellow, Asia Pacific Center for Theoretical Physics, Pohang, Korea, 2013-2015
Mentor: Prof. Arman Shafieloo
Integrated M.Sc.-Ph.D. Physics, Harish-Chandra Research Institute, HBNI, India, 2006 - 2012

Thesis title: Primordial features and non-Gaussianities (Doctor Of Philosophy was awarded by Homi Bhabha National Institute, Mumbai, India)
Thesis supervisor: Prof. L. Sriramkumar

B.Sc. Physics, Jadavpur University, Kolkata India, 2003 - 2006

Research interests

My research interests broadly include the study of,

Inflationary cosmology
Analysis of cosmological data, such as data from Cosmic microwave background, Large Scale Structure
Possible deviations from standard model of cosmology
Reionization
Large scale structure
Dark energy
Degeneracies in cosmology

I am mostly involved in numerical analysis of cosmological models. The codes I have developed are listed in the Developed Codes page of this website. Apart from comparing the models with the data, I also like to use different statistical techniques to reconstruct the theory from the data in model independent ways.

Survey collaboration

I am a member of CMB Bharat consortium collaboration and I led the Cosmological Parameters working group for our first proposal in response to the Announcement of Opportunity (AO) by the Indian Space Research Organization (ISRO), submitted on April 16, 2018. The executive summary can be found here. The proposal is for a next generation space mission for near-ultimate measurements of the Cosmic Microwave Background (CMB) polarization and discovery of global CMB spectral distortions

Presently I am also a member of the Euclid Consortium Collaboration. Euclid is an ESA mission to map the geometry of the Universe by observing the shapes and spectra of the galaxies and clusters of galaxies. In this collaboration I work within the Theoretical Working Group.

Publications and preprints

My list of publications and preprints from arXiv and iNSPIRE.