Research Interests
Using galaxy surveys and CMB data to study galaxy-black hole co-evolution, probing dark matter, dark energy, and cosmological parameters through large-scale structure.
Selected Publications
Research Interests
Condensed Matter Theory and Statistical Physics
Selected Publications
Research Interests
Cosmology and astroparticle physics.
Selected Publications
Research Interests
Prof. Saumen Datta's research is in particle physics, more specifically the strong interaction physics of quarks and gluons (QCD). He has studied the phase diagram of QCD and gauge theories, using large scale computational methods.
In particular, Prof. Datta is interested in exploring dynamical properties of the high temperature phase of QCD. He is also interested in the physics of QCD at high quark density. These phases are of interest for the early universe and for dense stars, and are explored in relativistic heavy ion collision experiments.
Selected Publications
Research Interests
Neutrino oscillation phenomenology, Supernova neutrinos, Astroparticle Physics
Selected Publications
Research Interests
Abhijit Gadde’s research explores foundational questions in quantum gravity and conformal field theory, and the deep connections between them revealed by the holographic correspondence. He is particularly interested in quantum entanglement and its applications to quantum gravity, holography, and topological phases of matter. His work also uses supersymmetry as a powerful tool to study strongly coupled quantum field theories and to carry out precision tests of holography.
Selected Publications
Research Interests
(1) EFT approach to study Higgs properties;
(2) bootstrap techniques for large N QCD;
(3) building models with a light Higgs but a high cutoff;
(4) the strong CP problem and axions
Selected Publications
Research Interests
Shamik Gupta works in the area of nonequilibrium statistical mechanics and complex systems, with a focus on understanding collective behaviour in interacting many-body systems. His research has contributed to the theoretical study of synchronization phenomena, particularly in coupled oscillator models such as the Kuramoto framework, where he has obtained several exact and analytically tractable results. He has also worked extensively on problems involving stochastic resetting, exploring its implications for relaxation, transport, and steady states in both classical and quantum settings. Another important aspect of his work concerns long-range interacting systems, where he has studied phase transitions, fluctuations, and dynamical properties away from equilibrium. More recently, his research has extended to quantum statistical physics, including topics such as monitored quantum dynamics, decoherence, and thermalization.
Selected Publications
Research Interests
Cosmology, theory and observations of cosmic microwave background and large scale structure, early Universe, using observations to discover new physics beyond the standard model
Selected Publications
Girish Kulkarni
Associate Professor (G)
22782427
Room A323
Research Interests
Cosmology focussing on the intergalactic medium, cosmic dawn and reionisation using theory, simulations and observations; active in LSST, REACH, JWST, SKA and 21-cm cosmology.
Selected Publications
Research Interests
Prof. Subha Majumdar’s research spans precision cosmology, secondary CMB anisotropies, large-scale structure and high-energy astrophysics, with a central focus on using cosmic observables to probe the hidden physics of the Universe. A central pillar of his research has been the development of robust theoretical and statistical frameworks that connect astrophysical complexity with cosmological inference. His work on self-calibration techniques for galaxy cluster surveys, cluster abundance and clustering statistics, and the impact of cluster structural evolution has been foundational in establishing galaxy clusters as precision tools for constraining dark energy and the growth of dark matter structure. He is also fascinated with galaxy to cluster `gastrophysics’ —linking intra-cluster thermodynamics, circumgalactic medium, entropy injection by supermassive black holes, and baryonic feedback processes to observables in the microwave and X-ray sky. Prof Majumdar has made important contributions to the secondary CMB distortions; for instance, he was the first to point out how giant radio lobes imprint distinctive non-thermal spectral, and spatial, signatures on the CMB. His review article on secondary CMB anisotropies remains the most comprehensive review of the subject. He is also interested in near-field cosmology, using the Milky Way and nearby galaxies: very recently, he was involved in the construction of a unique and most precise phase-space catalogue of stellar tracers extending from the Milky Way inner regions to the outer halo, providing an unprecedented laboratory for Galactic archaeology, dark matter physics, galactic dynamics, and precision mass modelling, etc.
Prof Majumdar was the first person in the Cosmology and Astroparticle (CAP) group in DTP and has been instrumental in building the group. He was a member of the Department of Astronomy and Astrophysics, TIFR, before moving to DTP, and has held visiting positions in ETH-Zurich (sabbatical) and LMU/MPA, Munich. Before joining TIFR, he was associated with the Astronomy Dept. at UIUC, USA and the Canadian Institute of Theoretical Astrophysics (CITA), Toronto.
Selected Publications
Research Interests
1. Lattice Field Theory and its applications to nuclear and particle physics, High-performance computing
2. Quantum computing, AI-ML for physics.
Selected Publications
Shiraz Minwalla
Distinguished Professor (J)
22782212
Room A 316
Research Interests
Prof. Minwalla studies various aspects of quantum field theory, gravity, and their interrelation via the AdS/CFT correspondence of string theory. His key contributions, to date, include: (1) The study of interplay between bulk black hole and boundary CFT dynamics, including, especially the discovery and detailed study of the fluid gravity correspondence; (2) The classifications of unitary representations of the conformal and superconformal algebra, the discovery of a superconformal index, and (3) The demonstration of (semi) universality of the thermodynamics of conformal field theories in at high energies and spin in larger than two spacetime dimensions; (4) The discovery of new black hole solutions in AdS (grey galaxies and DDBHs) and their use in characterizing the density of states of holographic theories like N=4 Yang Mills; (5) The demonstration that Chern Simons theories with fundamental matter are solvable in the large N limit, and the use of these solutions to uncover several unusual phenomena in these theories, including modified crossing symmetry rule, unusual statistics and Bose Fermi duality; (6) The discovery of new membrane like effective description of black hole dynamics in large numbers of spacetime dimensions; (7) A detailed study of UV IR mixing and solitionic solutions in noncommutative theories, together with the discovery of new noncommutative open string theories, and the characterization of a web of dualities involving these theories; (8) The conjecture that physically consistent gravitational scattering amplitudes with poles but no cuts are so constrained by general physical principles that they can effectively be enumerated.
Prof. Minwalla's work has been recognized by several awards including the New Horizons Breakthrough Award, the Infosys prize, the TWAS prize, the Shanti Swarup Bhatnagar Award, the Nishina Asia Award, the ICTP prize, the IIT Kanpur Distinguished Alumnus Award, , the Sloan Fellowship, J.C. Bose fellowship, and memberships of the Indian Academy of Science, the Indian National Science Academy and The World Academy of Science. As another measure of the impact of his work 38 of Prof. Minwalla's papers have received over 100 citations; five of these papers have been cited on over 500 occasions (according to the Inspire database as of April 13, 2026).
Selected Publications
Research Interests
Quantum gravity, quantum information theory, quantum field theory, AdS/CFT
Selected Publications
Research Interests
Prof. Roy is a particle physicist: an effective field theorist and a phenomenologist. His research encompasses topics ranging from building models of short-distance particle physics, collider physics, physics of jets and jet-substructure physics, flavor physics, cosmology and astro-particle physics, analytical approaches to field theories in the strong coupling limit, and visiting places where effective field theory approaches take him.
Along with colleagues from high energy physics and nuclear physics, Prof. Roy has recently initiated a project "Indian Mission in Positronium Experimental Thrust for Ultra-precision Searches" or IMPETUS, with the vision to build an End2End Indian experiment.
Selected Publications
Research Interests
Out-of-equilibrium statistical physics, stochastic processes, and mathematical physics, aiming to develop a general framework for non-equilibrium statistical mechanics.
Selected Publications
Research Interests
Quantum Information in Many Body System
Non Equilibrium Dynamics of Quantum Systems
Strongly Fluctuating Superconductors
Van der Waals Materials
Selected Publications
Research Interests
Rishi Sharma is interested in the properties of phases of QCD at finite temperatures and finite chemical potentials. These phases can be observed in heavy ion collisions, and affect the structure and dynamics of compact stars.
Effective Field Theory (EFT) techniques are particularly useful for understanding the dynamical properties of these phases, by allowing one to factorise observables into quantities that can be computed within the EFT in a controlled manner, and parts that can be matched to correlation functions which may be computed non-perturbatively using lattice QCD.
Selected Publications
Research Interests
1. Topological order in quantum spin systems: characterization, gauge theories, lattice effects, quasiparticle stability, finite-temperature thermal Hall transport.
2. Quantum scars: classification, detection, hidden symmetry-protected trivial (SPt) character
3. Non-invertible dualities in 2D systems with subsystem symmetries
4. Quantum algorithms for linear solving
5. Autonomous swarming strategies using sparse information
Selected Publications
Sandip P. Trivedi
Distinguished Professor (J)
22782424
Room A319
Research Interests
String theory and mathematical physics.