Abstract: We are now pursuing the realization of large-scale fault-tolerant universal optical quantum computers with our original continuous-variable quantum teleportation methodology. There are several points. One is that we can build a logical qubit for quantum error correction with a single pulse of light. It is totally different situation from other systems like super-conducting qubits, spins, and ions, which are two-level systems and thus they need many physical qubits and entanglement among them for building a logical qubit. We can replace the fragile multipartite entanglement with quantum correlation of photons in a single pulse of light. Another point of our methodology is that we do not have to be worried about decoherence of the system. We are using our original time-domain multiplexing methodology and make a measurement before the decoherence. We can continue quantum computing forever in principle.
Biography: Professor Akira Furusawa received his BS and MS degrees in applied physics and Ph.D. degree in physical chemistry from The University of Tokyo, Japan, in 1984, 1986, and 1991, respectively. His research interests cover the area of nonlinear optics, quantum optics, and quantum information science. He is currently Professor of Applied Physics, School of Engineering, The University of Tokyo and the Deputy Director of RIKEN Center for Quantum Computing. Professor Furusawa has authored more than 100 papers in leading technical journals and conferences, which include the first realization of continuous-variable quantum teleportation. He received the Ryogo Kubo Memorial Award, the JSPS prize, the Japan Academy Medal, the International Quantum Communication Award, the Toray Science and Technology prize, and the Medal with purple ribbon.
Location: Online Seminar
