Curriculum Vitae

Sumit Kumar

Assistant Professor at IIT (ISM) Dhanbad. Experimental physicist working on cavity optomechanics, superfluid ⁴He, MEMS/NEMS quantum sensing, and high-frequency gravitational wave detection. Trained at IIT Delhi, IISc Bengaluru, Institut Néel (CNRS / Univ. Grenoble Alpes), and Royal Holloway, University of London.

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Employment

Assistant Professor

IIT (ISM) Dhanbad — Department of Physics

Postdoctoral Researcher

Royal Holloway, University of London — Supervisor: Dr. Xavier Rojas
  • Investigating non-linearities in fourth-sound resonance of superfluid ⁴He sonic crystals
  • Conducting analogue cosmological simulations using third sound in superfluid ⁴He
  • Developing superfluid optomechanics for gravitational wave detection

Postdoctoral Researcher

Royal Holloway, University of London — Supervisor: Dr. Xavier Rojas
  • Led superfluid ⁴He cavity optomechanical experiments using superconducting microwave cavities
  • Explored room-temperature microwave optomechanics with Si₃N₄ membranes

Doctoral Researcher

Institut Néel, CNRS / Univ. Grenoble Alpes — Supervisors: Dr. Andrew Fefferman & Dr. Eddy Collin
  • Low-temperature cavity optomechanical experiments with Si₃N₄ nanostrings and aluminium drumheads
  • Expertise in nanofabrication, cryogenics, automation, and RF measurements

Research Intern

LPS, École Normale Supérieure, Paris — Supervisor: Dr. Mokhtar Adda-Bedia
  • Experiments on liquid nitrogen and water droplets to study the inverse Leidenfrost effect
  • Self-propulsion dynamics of water droplets on liquid nitrogen
Education

Doctorate

Institut Néel, CNRS / Université Grenoble Alpes, France

Master of Technology

Centre for Nanoscience and Engineering, Indian Institute of Science, Bengaluru

Bachelor of Technology — Engineering Physics

Indian Institute of Technology, Delhi
Talks & Conferences
  • Poster 2025 Superfluid optomechanics using third sound in superfluid ⁴He · QTFP (Quantum Technologies for Fundamental Physics), Glasgow
  • Talk 2024 Superfluid optomechanics using third sound in superfluid ⁴He · QSimFP workshop
  • Talk 2024 Non-linearities in the fourth sound resonance of superfluid ⁴He · QFS (Quantum Fluids and Solids), Florida
  • Talk 2022 Superfluid optomechanics using third sound in superfluid ⁴He · QSimFP workshop
  • Talk 2022 Superfluid optomechanics using third sound in superfluid ⁴He · IOP Low-Temperature workshop, London
  • Talk 2021 Low-temperature microwave optomechanics: anomalous force noise and OMIT · Department of Physics, Royal Holloway
  • Talk 2020 Anomalous spikes in the apparent vibration amplitude of nanomechanical strings · GdR MecaQ, Grenoble
  • Poster 2019 Electromechanically induced transparency and absorption · Quantum Fluids and Solids, Edmonton
  • Poster 2019 Probing individual two-level systems in amorphous NEMS · Atomic Tunneling Systems & Fluctuating Spins, Dresden
  • Talk 2018 Probing individual two-level systems in amorphous NEMS · GdR MecaQ Annual Meeting, Paris
  • Poster 2018 Probing individual two-level systems in amorphous NEMS · Journées de la Matière Condensée, Grenoble
  • School 2018 Cryocourse · Aalto University, Helsinki
  • School 2017 Foundations and Applications of Nanomechanics · Trieste, Italy
Awards
  • 2014 Best Major Project Thesis — Department of Physics, IIT Delhi (for undergraduate work on improved field emission from indium-decorated multi-walled carbon nanotubes)
  • 2013 Charpak Scholarship — French Embassy, for a research project at LPS, ENS Paris
References

Dr. Xavier Rojas

Lecturer, Royal Holloway, University of London — xavier.rojas@rhul.ac.uk

Dr. Andrew Fefferman

Researcher, Institut Néel / CNRS, Grenoble — andrew.fefferman@neel.cnrs.fr

Dr. Eddy Collin

Researcher, Institut Néel / CNRS, Grenoble — eddy.collin@neel.cnrs.fr