:::
Shotaro Shiba Theory Center, High Energy Accelerator Research Organization （KEK） Particle Physics 04/26-05/03, 2018 
Chang, Tu-Nan Dept of Physics and Astronomy, University of Southern California, USA Atomic Physics 05/22-6/19, 2018 
Gomi, Kiyonori Department of Mathematical Sciences, Shinshu University Interdiscipline & other 03/18-03/30, 2018 
Thiang, Guo Chuan Mathematical Sciences, University of Adelaide Interdiscipline & other 03/19-03/28, 2018
