서울대 작용소 세미나 2012 Apr 13: 배준우(Center for Quantum Technologies Singapore and ICFO-Institute of Photonic Sciences Barcelona Spain); Structural Approximations to Positive Maps and Its Applications 2013 Mar 22: 배준우(Center for Quantum Technologies (CQT), Singapore and Institute of Photonic Sciences (ICFO), Barcelona); Quantum Cryptography and Its Related Problems?