Theoretical Physics



 

  • The theoretical physics program focuses on the development of fundamental and phenomenological models to identify various new phases of dense nuclear matter with an emphasis to study the:(i) Equation of state of neutron-rich asymmetric nuclear matter formed atintermediate energy heavy ion collisions,(ii) Properties of the novel state of matter viz. the Quark-Gluon Plasma formed at ultra-relativistic energy heavy ion collisions at RHIC/BNL and LHC/CERN.
  • The density dependence of asymmetry energy has wide-ranging implications for the physics with radioactive ion beams to neutron stars. However, it is poorly known. Our group has developed relativistic mean-field and transport models that could constrain the asymmetry energy over wide density range by comparison with measurements of: neutron skin of various nuclei at subsaturation nuclear densities and mass-radius of neutrons stars at supranormal densities.
  • In ultra-relativistic heavy-ion collisions high temperature and density are reached.The quarks and gluons confined within the atomic nuclei are liberated to form the Quark-Gluon Plasma (QGP). Our group has developed very sophisticated transport modelsthat encompasses all stages of the collision. Within this model, we have shown thatthe QGP formed at RHIC and LHC is a (strongly coupled) near perfect fluid that haslarge anisotropic collective flow and long range dihadron correlations. We have also formulated relativistic dissipative fluid dynamics from kinetic theory which could explain the observed femtoscopic radii of emerging particles from QGP.