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:

Principal Investigator
Centre for Quantum Technologies
Associate Professor
Department of Electrical & Computer Engineering, College of Design and Engineering, National University of Singapore

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

  • Giovanni Chesi, Alberto Riccardi, R. Rubboli, Lorenzo Maccone, Chiara Macchiavello. (2023). A protocol for global multiphase estimation. Phys. Rev. A 108 012613
  • C. Hirche, Xinyue Guan, M. Tomamichel. (2023). Chain Rules for Renyi Information Combining. IEEE International Symposium on Information Theory (ISIT)
  • Y. Ouyang, M. Tomamichel, Min-Hsiu Hsieh, Barry C. Sanders, Jacquiline Romero, Kaumudibikash Goswami. (2023). Approximate reconstructability of quantum states and noisy quantum secret sharing schemes. Phys. Rev. A 108
  • Mario Berta, Fernando G. S. L. Brandão, Gilad Gour, Ludovico Lami, Martin B. Plenio, Bartosz Regula, M. Tomamichel. (2023). On a gap in the proof of the generalised quantum Stein\'s lemma and its consequences for the reversibility of quantum resources. Quantum 7 1103
  • E. Cervero, Kirill Plekhanov, Michael Lubasch. (2023). Barren plateaus in quantum tensor network optimization. Quantum 7 974
  • M. X. Cao, M. Tomamichel. (2023). Comments on “Channel Coding Rate in the Finite Blocklength Regime”: On the Quadratic Decaying Property of the Information Rate Function. IEEE Trans. Inf. 69
  • Y.L.Hu, Y. Ouyang, M. Tomamichel. (2023). Privacy and correctness trade-offs for information-theoretically secure quantum homomorphic encryption. Quantum 7 976
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