Quantum Information, Computation, and Physics

The quantum computer is a computer that works under the law of quantum physics. Since it is a controllable toy world of nature, we can get a better understanding of nature by understanding the behaviors of the quantum computer. For example, theory of quantum error correction, which is developed to prevent the quantum computer from noise, now attracts much attention from physicists providing a new and unified way of understanding important phenomena in physics such as topological order, thermalization of closed quantum systems, holographic principle, and black hole. Moreover, once the quantum computer is realized, we can freely explore the highly entangled frontier of physics in a high complexity limit. Our main research subject is theoretical studies on quantum computation, specifically, quantum error correction, quantum algorithm, quantum computational complexity, and quantum machine learning. We are interested in a wide range of physical fields related to quantum information science and advance both fundamental and applied research in the interdisciplinary field of physics and information/computation.