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

Oct 13, 2026 New preprint! Quantum impurity models: easy at equilibrium, universal in motion is up on the arXiv.
May 18, 2026 New preprints! Dissipative microcanonical ensemble preparation from KMS-detailed balance and Simulating dynamics of RLC circuits with a quantum differential-algebraic equations solver are up on the arXiv.
Dec 15, 2025 My website got an overdue update.

selected publications

2026

  1. Quantum impurity models: easy at equilibrium, universal in motion
    Srinivasan Arunachalam, Sergey Bravyi, Anirban Chowdhury, Arkopal Dutt, Alexandru Gheorghiu, and Zhi Li
    Oct 2026
    arXiv
  2. Quasiprobabilistic imaginary-time evolution on quantum computers
    Annie Ray, Esha Swaroop, Ningping Cao, Michael Vasmer, and Anirban Chowdhury
    Quantum Information & Computation, Oct 2026

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

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