rye saito

Saitou, Rio 齋藤亮


distinguished Junior Fellow

Home Institution



Ph.D. in Theoretical Cosmology at Nagoya University, Japan


R814, Astro-Math Bldg.




Research Fellow of JSPS (2013-2015)


Current Research Interests

Cosmology, especially natural low energy effective field theory for cosmology, Quantum field theory in curved spacetime

Selected Publications

“Ghost inflation and de Sitter entropy”
 S. Jazayeri, S. Mukohyama, R. Saitou and Y. Watanabe, JCAP 1608, no. 08, 002 (2016) [arXiv:1602.06511 [hep-th]].
“Derivative-dependent metric transformation and physical degrees of freedom”
 G. Domenech, S. Mukohyama, R. Namba, A. Naruko, R. Saitou and Y. Watanabe, Phys. Rev. D 92, no. 8, 084027 (2015) [arXiv:1507.05390 [hep-th]].
 “Hamiltonian structure of scalar-tensor theories beyond Horndeski”
 C. Lin, S. Mukohyama, R. Namba and R. Saitou, JCAP1410, no. 10, 071 (2014) [arXiv:1408.0670 [hep-th]].





I got my Ph.D. at Nagoya University in Japan. Then, I moved to KIPMU and ICRR in the University of Tokyo and worked there for one and a half year. After, I worked at HUST in China as a postdoc for two years before coming to LeCoSPA. I wish to learn much things and to find many questions and hopefully the answers for them with everyone. I like watching sports and Japanese animations, free/alpine climbing, riding a motorcycle, Red Hot Chili Peppers and lager beer made in Germany and Czech.