ICTS

Hi, I am Saptarshi. I am a theoretical physics graduate student in the statistical physics and condensed matter theory group at ICTS. I currently work at the intersection of statistical physics, quantum many body physics and quantum information theory.

My current research interests are:

• Spatial and dynamical structure of quantum information in quantum many body systems both in equilibrium and out of equilibrium.
• Fate of quantum information in quantum many body systems (particularly in circuits), under extensive measurements.
• Thermalisation in quantum many body systems going beyond ETH, and its connection to entanglement and quantum resource.

Education:

• 2023–present: Ph.D. in Theoretical Physics, International Centre for Theoretical Sciences – Tata Institute of Fundamental Research, Bengaluru.
  Supervisor: Dr. Sthitadhi Roy
• 2021–2023: Master of Science in Physics, Indian Institute of Technology Kharagpur.
• 2018–2021: Bachelor of Science in Physics, Jadavpur University, Kolkata.

Publications:

• Alan Sherry, Saptarshi Mandal and Sthitadhi Roy, Phys. Rev. B 113, 104301, “Information phases of partial projected ensembles generated from random quantum states and scrambling dynamics”, arXiv:2511.10595
• Saptarshi Mandal, Pieter W. Claeys and Sthitadhi Roy, Phys. Rev. B 113, 024303, “Partial projected ensembles and spatiotemporal structure of information scrambling”, arXiv:2508.05632