Group

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

Principal Investigator (aka Principle Investigator)

I am a 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.

Postdoctoral researchers

Dr. Erkka Happasalo (Senior Research fellow)

Google Scholar

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 Pellonpää and Teiko Heinosaari.

Dr. Jiawei Wu (Research fellow)

Google Scholar

I am 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. Milad Goodarzi (Research fellow)

Research Gate

I am broadly interested in mathematically inspired problems in quantum information theory. My current research involves entropic quantities, such as quantum conditional entropies, and topics in quantum probability, including central limit theorems for quantum systems. These problems often require advanced tools from matrix analysis and techniques from functional analysis.

Before joining this group, I was a postdoctoral fellow at the Institute for Research in Fundamental Sciences (IPM), working with Salman Beigi. Prior to that, I completed a PhD in mathematics at Shiraz University, where I worked on problems in operator algebras.

Dr. Sayantan Sen (Research fellow)

Google Scholar, Website

My field of research lies broadly in learning theory and randomized and quantum algorithms. I am currently working on learning theory and property testing, where the main focus is to design efficient sampling and query algorithms for various distribution and graph problems in classical and quantum models.

I was previously a research fellow at the School of Computing, National University of Singapore, hosted by Prof. Arnab Bhattacharyya. I did my PhD from the Indian Statistical Institute, Kolkata, under the supervision of Prof. Sourav Chakraborty.

Dr. Ian George (Research fellow)

Google Scholar

My primary research focus is on quantum communication and cryptographic schemes. This requires the development of new analytic and numerical tools due to the nature of quantum mechanics and its mathematical formalism. Most of my work has focused on information-theoretic methods that have been applied to, among other things, establishing the security of practical quantum cryptographic schemes, the fundamental limits of quantum communication networks, and the behaviour of dynamical systems (both classical and quantum). These works often also rely on using methods from optimization theory.

I previously obtained my PhD in Electrical and Computer Engineering at University of Illinois at Urbana-Champaign under the advisement of Eric Chitambar and my MSc in Physics― Quantum Information under the supervision of Norbert Lütkenhaus.

Dr. Minglong Qin (Research fellow)

Website

My research interests include Boolean function analysis in quantum computation, quantum computational complexity, and quantum cryptography. Currently, my work focuses on quantum nonlocal games, quantum oblivious transfer, and pseudorandom unitary constructions.

I received my Ph.D. in Quantum Computing from Nanjing University, where I was advised by Professor Penghui Yao.

PhD students

Josep Lumbreras

Website

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

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

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

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

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. Before joining the group I was supervised by Charles Lim.

Tristan Philippe

My research focuses on quantum cryptography and information theory. I am interested in the security of quantum cryptographic primitives. I am currently working on quantum codes to investigate whether they can be applied to perform verification in some cryptographic tasks.

I previously obtained my master’s degree at Telecom Paris in France where I worked on computer science and quantum information theory.

Jan Seyfried

My main area of interest is (quantum) learning theory, which naturally combines my broader interests in theoretical computer science and quantum information. Efficiently learning specific parameters of a quantum system requires insights into its information-theoretic properties, as well as the right algorithmic and statistical tools to extract them. 

Before joining the group, I completed both my MSc and BSc degrees in Physics at ETH Zürich in Switzerland, where I was fortunate to benefit from the many courses offered by the theory groups of the physics and computer science departments.

Long-term visitors

Milan Mosonyi

Alumni

A/Prof. Christoph Hirche

Personal website

Previously a Marie Skłodowska-Curie Global Fellowship postdoc in our group and now a Junior Professor at the Insititute for Information Processing at the University of Hannover.

Prof. Yonglong Li

Previously a Postdoc in our group and now a professor at Xi’an Jiaotong University, China.

Google scholar

Dr. Michael Cao

Previously a Research Fellow and now doing another postdoc at RHTW Aachen with Mario Berta.

Google Scholar

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.

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 Okinawa Institute of Science and Technology, Japan.

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.