There are many research centers and researchers in India working in hep-th (High Energy Physics, Theory), gr-qc (General Relativity/Quantum Cosmology) and quant-ph (Quantum Physics). However they are scattered all over the place and I have not been able to find a place which lists the names of places and individuals working in these fields in India. So, I figured, why not make a list! Here is my attempt at making one. It is, hopefully, a continuing work to be expanded over time. Naturally, this list reflects my own intellectual biases and is not meant to be a comprehensive list of all researchers in theoretical physics in India.
| Name | Institution | Areas of Interest | Publications |
| Thanu Padmanabhan | IUCAA, Pune | Classical General Relativity, Cosmology, Emergent Gravity, Quantum Gravity | INSPIRE |
| Romesh Kaul |
IMSc Chennai, CTP Delhi | Black Hole Entropy, Loop Quantum Gravity, Knot Invariants, Mathematical Physics |
INSPIRE |
| Dharam Vir Ahluwalia | IIT Guwahati, IUCAA, Himachal Pradesh Univ |
Standard Model and Beyond, Neutrino Physics, Dark Matter | INSPIRE |
| Kinjalk Lochan | IISER Mohali | Quantum Foundations, Black Holes, Cosmology, Quantum Gravity | arXiv |
| Golam Mortuza Hossain | IISER, Kolkata | Loop Quantum Gravity, Quantum Field Theory, Black Hole Entropy, Cosmology | INSPIRE |
| Sushant G. Ghosh | CTP, Delhi | Black Holes, Classical General Relativity, Gravitational Collapse | INSPIRE |
| Ghanshyam Date | IMSc, Chennai | Loop Quantum Gravity, Gravitational Waves, High Energy Theory, | INSPIRE |
| Arun K. Pati | QIC Group, HRI, Allahabad | Quantum Information, Quantum Computation, Geometric Phases | INSPIRE |
| Rathin Adhikari | CTP, Delhi | Standard Model Phenomenology, Baryogenesis, Cosmology, Supersymmetry | INSPIRE |
| Hemwati Nandan | Gurkul Kangri University, Haridwar | QCD, Classical General Relativity, Cosmology, | INSPIRE |
| Loganayagam R. | ICTS, Bengaluru | String Theory, Black Holes, Quantum Field Theory | INSPIRE |
| Kamal Lochan Panigrahi | IIT Kharagpur | String Theory, Quantum Gravity, High Energy Theory | INSPIRE |
| Kazuyuki Furuuchi | Manipal Center for Natural Sciences | Cosmology, Elementary Particles, String Theory | INSPIRE |
| Amitabh Virmani | Institute of Physics, Bhubaneswar | String Theory, Black Holes, Mathematical Physics | INSPIRE |