Ashutosh Marwah

Email: ashutosh.satyajit.marwah (at) umontreal.ca

Github: goforashutosh

Hi, I am a fourth year PhD student at the Department of Computer Science and Operation Research in the University of Montreal.

My work involves studying quantum information theory to prove security of cryptographic protocols.

I am presently looking for opportunities in applied cryptography, particularly to build applications which enhance privacy and security of everyday users.

Education

Currently, I work as a PhD student with Frédéric Dupuis at the University of Montreal. Prior to this, I completed my master’s at the Institute for Quantum Computing, University of Waterloo working with Norbert Lütkenhaus and my bachelor’s at the Indian Institute of Technology, Delhi.

Master’s thesis: link, pdf

Publications

  1. Ashutosh Marwah and Frédéric Dupuis. Universal chain rules from entropic triangle inequalities (preprint). arXiv:2412.06723 (2024)
    • Presentation at BIID 2024: pptx
  2. Ashutosh Marwah and Frédéric Dupuis. Proving security of BB84 under source correlations (preprint). arXiv:2402.12346 (2024)
    • Presentation at QKD workshop in IQC: pptx
  3. Ashutosh Marwah and Frédéric Dupuis. Smooth min-entropy lower bounds for approximation chains. Commun. Math. Phys. 405, 211 (2024)
    • Presentation for SRS Quantum Information/ BIID 2023: pptx
  4. Ashutosh Marwah and Frédéric Dupuis. Uniform continuity bound for sandwiched Rényi conditional entropy. Journal of Mathematical Physics, 63(5):052201 (2022)
  5. Ashutosh Marwah and Dave Touchette. Optical quantum communication complexity in the simultaneous-message-passing model. Phys. Rev. A 102, 062608 (2020)
  6. Norbert Lütkenhaus, Ashutosh Marwah and Dave Touchette. Erasable Bit Commitment From Temporary Quantum Trust. IEEE Journal on Selected Areas in Information Theory, vol. 1, no. 2, pp. 536-554 (2020).
  7. Ashutosh Marwah and Norbert Lütkenhaus. Characterization of Gram matrices of multi-mode coherent states. Phys. Rev. A 99, 012346 (2019).

Selected Projects

  1. Halo2-svd: A library for singular value decomposition (SVD) verification and matrix operations in Halo2. Developed as a part of Axiom Open Source Program (Oct 2023).
  2. secretBallot: A single stage private voting application with recursive vote aggregation on MINA blockchain. Developed during ZKP/Web3 hackathon organized by UC Berkeley (May 2023).

Miscellaneous

  1. Approximately equal measurements result in approximately equal statistics: pdf
  2. Approximate equality of quantum states implies operator inequality in large subspace: link
  3. Presentation on BabySpartan (work by Srinath Setty and Justin Thaler): pptx

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