I am an Assistant Professor in Quantum Information and Technologies at the Indian Institute of Technology Bhubaneswar. I received my Ph.D. in Quantum Many-Body Theory from IACS, Kolkata mentored by Prof. Krishnendu Sengupta and subsequently held postdoctoral positions at the University of Ljubljana, Slovenia, and University College London, UK. My research lies at the intersection of quantum information science, many-body physics, and emerging quantum technologies. I work on quantum state preparation via adiabatic and non-adiabatic methods, quantum annealing, and quantum sensing, with a particular focus on exploiting many-body correlations and phase transitions for technological advantage. My recent work explores the dynamics of spin systems in arbitrary geometries and the enhancement of performance in quantum annealers through catalysts and customized embeddings, along with state characterization techniques for quantum simulation platforms.

In my teaching, I emphasize modern simulation and numerical methods, including tensor network approaches and code optimization to develop both conceptual understanding and practical intuition for quantum systems. Looking ahead, my broader research vision is to develop scalable frameworks for quantum state engineering and control in interacting systems, with applications ranging from quantum sensing and computation to transport phenomena in programmable quantum devices.

Quantum Physics -II

Physics Laboratory -I

1. “Enhancing the Energy Gap of Random Graph Problems via XX-catalysts in Quantum Annealing”, LA Nutricati, R Ghosh, N Feinstein, S Bose, PA Warburton, Quantum Science and technology 10 045010 (2025).
2. “Re-entrant localization induced by short-range hopping in the fractal Rosenzweig-Porter Model”, R Ghosh, M Sarkar, I M Khaymovich Physical Review B 111 (22), L220102 (2025).
3. *“Exponentially enhanced quantum sensing with many-body phase transitions”, S Sarkar, A Bayat, S Bose, R Ghosh Nature Communications 16 (1), 1-11 (2025).
4. *“Quantum Liang Information Flow Probe of Causality Across Critical Points”, R Ghosh, Y Bin, S Bose, Physical Review Letters 134 (15), 150202 (2025).
5. “Separability criterion using one observable for special states: Entanglement detection via quantum quench”, R Ghosh, S Bose, Physical Review Research 6 (2), 023132 (2024).
6. “Tuning the phase diagram of a Rosenzweig-Porter model with fractal disorder”, M Sarkar, R Ghosh, IM Khaymovich Physical Review B 108 (6), L060203 (2023).
7. * “Relaxation of imbalance in a disordered XX model with on-site dephasing”, R Ghosh, M Žnidarič, Physical Review B 107 (18), 184303 (2023).
8. “Boundary chaos: Exact entanglement dynamics“, Fritzsch, Felix, Roopayan Ghosh, and Tomaž Prosen. SciPost Physics 15.3 (2023) 092.
9. * “Resonance-induced growth of number entropy in strongly disordered systems”, R Ghosh, M Žnidarič, Physical Review B 105 (14), 144203 (2022).
10. “Signatures of multifractality in a periodically driven interacting Aubry-André model”, M Sarkar, R Ghosh, A Sen, K Sengupta, Physical Review B 105 (2), 024301(2022).