Academic Experts
Academic Experts
Dr. Urbashi Satpathi
ASSISTANT PROFESSOR (SR GRADE)
urbashi.satpathi@jiit.ac.in
Biography

Dr. Urbashi Satpathi is currently an Assistant Professor (Senior Grade) in Department of Physics and Material Science, JIIT Noida. She did her M.Sc. in Physics from Presidency College, University of Calcutta, and secured first rank in her batch. She got DST-Inspire fellowship for PhD in 2011. In 2016 she finished her PhD from S. N. Bose National Centre for Basic Sciences, Kolkata. Later she did Post-Doctoral research from Raman Research Institute, Bangalore (Feb 2016-Sep-2018) and International Centre for Theoretical Sciences (ICTS-TIFR), Bangalore (Oct 2018-Aug-2021). Then she went to Israel as a Senior Post-Doctoral fellow in Ben-Gurion University of Negev.

Dr. Urbashi Satpathi’s research lies at the interface of quantum dynamics, statistical mechanics, and condensed matter physics. She works extensively on open quantum systems, with a particular focus on quantum Brownian motion, where she studies diffusion, noise, and dissipation effects in quantum regimes using tools such as the quantum Langevin equation and response functions. Her interests also include quantum thermodynamics, especially fluctuation–dissipation theorems, transport phenomena, and non-equilibrium dynamics in different time and temperature regimes. She has contributed to understanding quantum transport in mesoscopic systems. Another significant direction in her work is the role of chaos in many-body tunneling phenomena, particularly in weakly coupled Bose–Josephson junctions, where classical and quantum chaos interplay with tunneling dynamics. She is also interested in the emergence of soliton solutions in non-integrable systems, focusing on the robustness of localized wave structures in complex quantum settings. 
 

Educational Qualifications

Department of Physics & Materials Science and Engineering (PMSE), Jaypee Institute of Information Technology (JIIT), Noida - Wish Town Campus, Sector 128, India.

Research Highlights

In her most recent work, Dr. Urbashi Satpathi has advanced the study of cold atoms and open quantum systems by combining theoretical modeling with experimental insights. She has investigated how light-assisted tunable interactions modify the position response function of cold atoms in magneto-optical traps, showing that collective oscillations can be accurately described using generalized quantum Langevin dynamics (Effect of light-assisted tunable interaction on the position response function of cold atoms, Optics Express, 2025). In related work, she analyzed the response of cold atoms in optical molasses to transient magnetic perturbations, highlighting the crossover from underdamped oscillations to overdamped relaxation and linking this behavior to diffusion once the trap is removed (Measurements and analysis of response function of cold atoms in optical molasses, Optics letters, 2024).

Areas Of Interest
  • Nonequilibrium many-body quantum physics
  • Open quantum systems
  • Quantum Brownian motion
  • Non-integrable systems
  • Quantum Transport
Publications
  1. A. Misra, U. Satpathi, et al., “Non-resonant inter-species interaction and its effect on the position response function of cold atoms”, Optics Express, vol. 33, no. 11, pp. 22654-22665, 2025.
  2. A. Misra, U. Satpathi, et al., “Effect of light-assisted tunable interaction on the position response function of cold atoms”, Optics Letters, vol. 49, no. 15, pp. 4377-4380, 2024.
  3. U. Satpathi, S. Ray, A. Vardi, “Chaos assisted many-body tunnelling”, Physical Review E, vol. 106, no. 4, pp. L042204, 2022.
  4. S. Bhattacharjee, U. Satpathi, S. Sinha, “Long Time Tails in Quantum Brownian Motion of a charged particle in a magnetic field”, Physica A, vol. 608, pp. 128266, 2022.
  5. A. Das, A. Dhar, I. Santra, U. Satpathi, S. Sinha, “Quantum Brownian motion: Drude and Ohmic baths as continuum limits of the Rubin model”, Physical Review E, vol. 102, pp. 062130, 2020.