Anirban Chowdhury

Staff Research Scientist at IBM Research

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I work on quantum algorithms for physics simulation, quantum Hamiltonian complexity and classical simulation of quantum many-body systems.

I have a PhD in physics from the University of New Mexico where I was fortunate to be supervised by Rolando Somma.

Before joining IBM, I was a postdoctoral fellow at the Institute for Quantum Computing (IQC) advised (officially) by David Gosset and (unofficially) by Raymond Laflamme. I also did a postdoc at the Universite de Sherbrooke in the group of David Poulin.

My CV can be downloaded here.

news

Dec 15, 2025 My website got an overdue update.

selected publications

2025

  1. Classical Estimation of the Free Energy and Quantum Gibbs Sampling from the Markov Entropy Decomposition
    Samuel O Scalet, Angela Capel, Anirban N Chowdhury, Hamza Fawzi, Omar Fawzi, Isaac H Kim, and Arkin Tikku
    Apr 2025
    arXiv

2024

  1. Quantum Approximate Counting with Additive Error: Hardness and Optimality
    Mason L Rhodes, Sam Slezak, Anirban Chowdhury, and Yiğit Subaşı
    Nov 2024
    arXiv

2022

  1. Quantum Hamiltonian complexity in thermal equilibrium
    Sergey Bravyi, Anirban Chowdhury, David Gosset, and Pawel Wocjan
    Nature Physics, Oct 2022

2017

  1. Quantum algorithms for Gibbs sampling and hitting-time estimation
    Anirban Narayan Chowdhury, and Rolando Diego Somma
    Quantum Information and Computation, Jan 2017