Marco Tomamichel Group

Our research explores the intersection of information theory, cryptography and quantum mechanics. Our focus is the mathematical foundations of quantum information theory, for example the study of entropy and other information measures, as well as theoretical questions that arise in quantum communication and cryptography when the available resources are limited.

Information processing with finite resources: One main challenge when engineering quantum processors is that complex quantum systems are notoriously hard to prepare and control coherently. We therefore investigate quantum information processing with noisy and limited resources.

Mathematical foundations of quantum information: Progress in information theory often goes hand in hand with a more thorough understanding of the mathematical framework underlying it. We are interested, for example, in exploring various measures of entropy, information and correlation based on Rényi divergences.

Cryptography in a quantum world: Securing information against potential adversaries is a ubiquitous challenge in our modern world. We are interested in security proofs for various cryptographic schemes.

More information at our homepage:

Marco Tomamichel holds a joint appointment as CQT Principal Investigator and Associate Professor in the Department of Electrical and Computer Engineering, National University of Singapore. His research interests lie in the intersection of information theory, cryptography and quantum mechanics.

Marco received an MSc in Electrical Engineering and Information Technology from ETH Zurich in 2007. He followed his interest in quantum information to graduate with a PhD in Physics at the Institute of Theoretical Physics, also at ETH, in 2012. He came to CQT for a postdoctoral stint, then was a Research Fellow at the University of Sydney and an Associate Professor at the University of Technology Sydney before returning to NUS in 2020.

Group Members

Recent papers

  • M. Tomamichel, Robert Koenig, Sergey Bravyi, David Gosset. (2020). Quantum advantage with noisy shallow circuits. Nature Physics
  • M. Tomamichel, Anthony Leverrier. (2017). A largely self-contained and complete security proof for quantum key distribution . Quantum 1 14
  • Hao-Chung Cheng , Min-Hsiu Hsieh, M. Tomamichel. (2017). Exponential decay of matrix Φ-entropies on Markov semigroups with applications to dynamical evolutions of quantum ensembles. J. Math. Phys. 58 092202
  • P. Coles, Mario Berta, M. Tomamichel, S. Wehner. (2017). Entropic Uncertainty Relations and their Applications . Rev. Mod. Phys. 89 015002
  • M. Tomamichel, M. Hayashi. (2018). Operational Interpretation of Rényi Information Measures via Composite Hypothesis Testing Against Product and Markov Distributions. IEEE Transactions on Information Theory 64 1064 - 108
  • Mario Berta, Omar Fawzi , M. Tomamichel. (2017). On Variational Expressions for Quantum Relative Entropies . Letters in Mathematical Physics 107 2239–226
  • Mario Berta, M. Tomamichel, Mark M. Wilde. (2017). Converse bounds for private communication over quantum channels . IEEE Transactions on Information Theory 63 1792-1817
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