Theory

The theory and practice of quantum computing have both developed dramatically in recent years. At the top, advances in theory and algorithms have taught us much about the nature of computational complexity and broadened the range of potential uses of quantum computers. At the bottom, physicists are investigating a breathtaking array of potential qubit storage and quantum gate technologies.

The research group is committed to theoretical research in quantum optics and quantum information processing. The members are the research staff of the Department of Quantum Optics and Quantum Information within the ranks of the Institute of Solid State Physics and Optics of the Wigner Research Centre in Budapest.

We study fundamental aspects of quantum theory through the analysis of relevant information processing tasks and algorithms. We are interested in the formulation of physical principles in terms of information processing possibilities.

When the particles that make up a material are strongly-correlated, we theorists get a run for our money: qualitatively new behaviour emerges and the whole is a lot more than the sum of its parts. The theoretical description of matter in such challenging circumstances benefits from very close interaction with experimentalists. For this reason the University of Kent has set up, as part of the SEPnet collaboration, a small outpost of theorists at the ISIS Facility in the Rutherford Appleton Laboratory.

The group is involved in research on a wide spectrum of topics in quantum information science, including quantum communication, quantum cryptography, and theory of entanglement. The QIC group also actively works in the recently developing field at the interface of quantum many-body physics and quantum information. Other interests include realizable quantum computers in ultra-cold gases, and in quantum optical systems, and foundations of quantum mechanics.

Institute of Theoretical Physics and Astrophysics is a strong center of theoretical physics. It is especially known for the achievements of its employees in the field of quantum optics and quantum information theory (profs. Michal Horodecki, Ryszard Horodecki, Marek Zukowski) mathematical physics (profs. Wladyslaw Adam Majewski, Robert Alicki) and others with considerable achievements.

Our group consists of PhD/MSc/BSc students who are working under the leadership of Prof. Vahid Karimipour. At the moment, the research interest of the group is mainly focused on measurement-based quantum computation, quantum channels with memory, quantum control, and quantum many-body systems. We have organized three international workshops and schools in 2007, 2008 and 2010. To find information about these activities, please go through the webpage.