Date and Time:  16-June-2022  17:15-18:15

Speaker:  Prof. Philip Walther, Professor of Physics at the University of Vienna, Austria. Fellow of the American Physical Society (APS) and the Optical Society of America (OSA), and member of the Young Academy of the Austrian Academy of Sciences.

Host: Gui-Lu Long (Tsinghua Univ.& BAQIS）

Title: From secure two-way communication and quantum cryptography with classical users to one-time programs

Abstract: 

At this lecture I will present recent developments of secure quantum information processing that exploit the processing of one single photon. I will discuss the experimental realization of a secure two-way quantum communication scheme using a simple interferometric alignment. Based on this concept I will also present the possibility of quantum key distribution by using only classical users without the usage of any quantum technology. As final experiment I will discuss the realization of a feasible hybrid classical-quantum technology for secure classical computing by enabling probabilistic one-time programs.

About the Speaker:

Philip Walther is Professor of Physics at the University of Vienna, Austria. His research is dedicated to the development of advanced of quantum technology for applications in quantum information processing and for investigations in quantum science. The experiments are focused on photonic quantum computation and secure quantum information processing as well as quantum foundations such as indefinite causal structures and the measurement of weak gravitational effects on single photons using table-top setups. He is Fellow of the American Physical Society (APS) and the Optical Society of America (OSA), and member of the Young Academy of the Austrian Academy of Sciences.