Quantum Information Theory group (September 2022)

We are always looking for new talent with a strong interest and a track-record in mathematical aspects of quantum information theory. Please contact me.

Principal investigator

Marco Tomamichel

Principle Investigator

I am an Associate Professor with the Department of Electrical and Computer Engineering as well as a Principal Investigator with the Centre for Quantum Technologies at the National University of Singapore.

My research group is located at the Centre for Quantum Technologies and my office is S15-04-09.

My CV is available here.

I obtained a Master of Science from the Department of Electrical Engineering and Information Technology at ETH Zurich, and a doctorate in Theoretical Physics also from ETH Zurich under Prof. Renato Renner. Before starting my current position I was a postdoc at the Centre for Quantum Technologies at the National University of Singapore, a University of Sydney Postdoctoral Fellow, and an Australian Research Council Discovery Early Career Researcher Award fellow and Associate Professor at the University of Technology Sydney.

I am an Associate Editor for the IEEE Transactions on Information Theory and on the Editorial Board of Proceedings of the Royal Academy A. I am also currently serving as the chair of the steering committee of TQC.

Postdoctoral researchers

Dr. Erkka Happasalo (Research fellow)

Google Scholar

I am a research fellow working in Professor Marco Tomamichel’s group at CQT NUS. My primary research interests deal with mathematical foundations of quantum theory and their applications in quantum measurement theory and quantum information.

According to quantum theory, different measurement devices cannot typically be applied simultaneously on the same system nor sequentially without disturbance. The operational implications of this quantum incompatibility are central to my studies. I am also working on information-theoretic questions such as conditions for asymptotic and catalytic transformations of states with limited resources.

I have previously worked as a postdoctoral researcher at Kyoto University with Professor Takayuki Miyadera and at Fudan University in Shanghai with Professor Huangjun Zhu. I got my PhD at the University of Turku under the supervision of Juha-Pekka Pellonp\”{a}\”{a} and Teiko Heinosaari.

Dr. Christoph Hirche (Marie-Curie research fellow)

Personal website

I am a postdoctoral researcher, currently carrying out a Marie Skłodowska-Curie Global Fellowship with Robert König at TU Munich and Marco Tomamichel at CQT NUS.

My research area is information theory, with a focus on quantum communication and quantum information processing. I’m interested in exploring the theoretical limitations of these tasks to better understand the potential impact of using quantum information. A particular focus of my work is on entropic quantities, e.g. entropy inequalities and their applications.

Previously, I was a postdoctoral researcher in QMATH at the University of Copenhagen, where I worked with Matthias Christandl. I obtained my PhD degree from the Universitat Autonoma de Barcelona under the supervision of John Calsamiglia.

Dr. Michael Cao (Research fellow)
Dr. Jiawei Wu (Research fellow)

Google scholar

I am a postdoctoral researcher in Marco Tomamichel’s group at CQT NUS.

I’m interested in the security/privacy problem in cryptographic tasks using quantum resources. My current research focuses on quantum homomorphic encryption and secure multiparty quantum computation.

I receive my PhD degree at Tsinghua University, where I worked on theoretical security of quantum direct communication.

Dr. Yonglong Li (Research fellow, jointly with Vincent Y.F. Tan)

PhD students

Josep Lumbreras

I am currently a PhD student under the supervision of Professor Marco Tomamichel at the Centre for Quantum Technologies in Singapore.

My research interests mainly lie in the area of quantum learning theory, which combines topics such as statistical learning theory with quantum information. Specifically, we employ different tools from information theory to derive lower bounds for quantum learning problems. In my research, I have been exploring the application of stochastic bandit theory to online quantum learning problems.

Previously, I completed a master’s degree in particle physics at the University of Barcelona and worked as an undergraduate intern at the Quantic group (Barcelona Supercomputing Center), focusing on topics related to variational quantum algorithms.

Roberto Rubboli

I am a PhD student at the Centre for Quantum Technologies (CQT) supervised by Prof. Marco Tomamichel. My main research focus is on mathematical aspects of quantum resource theories.

I am currently investigating mathematical properties of resource monotones. I am particularly interested in the fundamental limits that such properties imply for several quantum tasks.

I obtained my master’s degree at the University of Bologna in Italy where I worked on topics in condensed matter physics.

Yanglin Hu

I am a PhD student currently under the guidance of Professor Marco Tomamichel at CQT NUS. My research area primarily focuses on quantum information theory, with a particular emphasis on exploring and pushing the boundaries of information-theoretically secure quantum cryptography.

My interest lies in finding applications of quantum information and understanding its ultimate limit. Currently, I am dedicating my efforts to quantum homomorphic encryption, investigating its capabilities and analyzing its relationships with other cryptographic primitives.

Prior to this, I completed my MSc degree from ETH Zurich and my BSc degree from Peking University, which has greatly enriched my knowledge and skills in quantum information theory.

Enrique Cervero

I am a PhD student in Marco Tomamichel’s Quantum Information Theory group at CQT, Singapore.

My research area is primarily on quantum key distribution, with a particular focus on the finite key analysis of device independent protocols based on non-local games.

My main interests lie in the area of quantum key distribution and other information-theoretically secure quantum cryptographic primitives. However, I also have previous experience in variational algorithms and fault-tolerant algorithms.

Prior to joining Marco’s group, I received my MSc degree from the University of Copenhagen, where I worked closely with Laura Mancinska on algorithms for weak Schur sampling. Following Copenhagen, I was a summer fellow in Antonio Acín’s Quantum Information Theory group in ICFO, Barcelona and a quantum machine learning intern at Cambridge Quantum (now Quantinuum).

Frits Verhagen

I am a PhD student at the Centre for Quantum Technologies. My current supervisor is Professor Marco Tomamichel, and previously I was supervised by Professor Charles Lim.

My research interests are in quantum information theory, mathematical physics and cryptography. Within these topics, I like both the mathematical aspects as well as applications such as quantum key distribution.

Previously, I received a Master’s degree from Utrecht University in both theoretical physics and mathematics. My thesis was on a topic in string theory that used methods from graph theory.

Interns and visiting students

Paula Belzig (visiting Ph.D. student, February – May 2023)

Akshay Bansal (visiting Ph.D. student, May – July 2023)

Martina Lee Zhe Weng (undergraduate intern)

I am an undergraduate student pursuing Physics at Nanyang Technological University. During my time in Junior College, I had the opportunity to attend Qcamp organized by CQT. Ever since then, I’ve been captivated by the mind-bending concepts and limitless possibilities that quantum information offers.

Currently, my focus lies in quantum homomorphic encryption, and I am eager to delve deeper into the realms of quantum cryptography and quantum information within this research group.

Outside of academics, I have a passion for outdoor activities such as hiking and cycling. I find joy in playing the piano and exploring the art of calligraphy. Additionally, I am an avid reader and writer, and I also enjoy engaging in board games.

Rebecca Chung Ru Byn (undergraduate intern)

Shrigyan Brahmachari (post-graduate intern)

Alumni (postdocs and graduates)

Dr. Yingkai Ouyang

Previously a Senior Research Fellow in our group and now EPSRC Quantum Technologies Fellow at the University of Sheffield.

Personal website

Dr. Christopher Chubb

Graduated with PhD from the University of Sydney, supervised with Steve Flammia. Now Postdoc at ETH Zurich in Switzerland.

Personal website

Dr. Akram Youssry

Graduated with a PhD from the University of Technology Sydney, supervised with Chris Ferrie. Now Postdoc at Royal Melbourne Institute of Technology (RMIT) in Australia.

Dr. Maria Quadeer

Graduated with a PhD from the University of Technology Sydney, supervised with Chris Ferrie. Now Postdoc at Nanyang Technological University, Singapore.

A/Prof. Hao-Chung Cheng

Graduated with a PhD from the University of Technology Sydney, supervised with Min-Hsiu Hsieh. Now Faculty at National Taiwan University, Taiwan.

Alexander McKinlay

Graduated with a Masters degree from the University of Technology Sydney. Now in private industry in Australia.