Research & Teaching
Though
I started my Ph.D. in particle physics, I got interested in the newly
emerging area of astroparticle physics. I have
explored phase transitions in the early universe, inflation in supergravity models and baryogenesis
in various papers written with many coworkers. Some years ago, I got
interested in the area of gravitational lensing and how it could be used to
provide some constraints on cosmological parameters. I have also been,
together with some colleagues exploring the area of a viable coasting
cosmology as also Cosmic Microwave Background Radiation. Exploring the
various models of dark energy in the universe is another area of interest.
Currently, we are using various statistical techniques and observational
data to constrain cosmological parameters and dark energy models. Apart
from cosmology and particle physics, I have also dabbled in traffic
simulation, biological networks and modelling
antibiotic resistance using tools like Monte Carlo simulations and
artificial neural networks.
Over
the years I have taught many courses at the undergraduate &
postgraduate level. These include Mathematical Physics, Modern Physics,
Electrodynamics, Radiation Theory, Astrophysics, Computational Physics,
Numerical Analysis & CProgramming, and Nuclear Physics Laboratory etc.
I have authored Manuals on Numerical Analysis
& C programming, Nuclear Physics Laboratory
, Data Analysis and Markov Chain Monte Carlo
etc. for use by students. Notes on Astronomy & Astrophysics
and on Electromagnetic Theory
& Electrodynamics.

Other
Interests
I
have been writing in many newspapers and
magazines on a variety of issues. I have also been a regular
contributor to several magazines including Down To Earth, Chatterbox, The
Book Review etc.
I
have written more than a dozen books
for young adults which have been published by
Scholastic Inc. Amongst my other books, From
Bugs to Blackholes has been published by Penguin Books. The Story of
Technology and The Story of Science
have been published by Ulman. Have also
translated several books from English to Hindi for Pratham.
I have
contributed the chapter on Science
& Mathematics Teaching for the Routledge Handbook of Education in India . I
have also contributed to two edited volumes The University Unthought: Notes for a Future, and The
Idea of a University.
I
have been associated with several Voluntary Agencies in various capacities.
These include CENDIT, Dr. Arvind N. Das
Foundation, Sampradayikta
Virodhi Andolan &
Om Charitable Trust.
