Yuimaru (Yui) Kubo completed his undergraduate study at the University of Tsukuba in March 2004. His senior thesis project was on crystal growth of a high-temperature cuprate superconductor (bismuth compound, Bi2Sr2CaCu2O8) in the group of Prof. Kazuo Kadowaki. He studied vortex dynamics in stacks of micron-size intrinsic Josephson junctions of BSCCO for his master thesis.
For his PhD dissertation project, Yui moved to National Institute for Materials Science (NIMS), which is also located in Tsukuba, and joined the group of Dr. Yoshihiko Takano. There he worked on macroscopic quantum tunneling (MQT) experiments in high-Tc Josephson junctions, and observed MQT and phase diffusion in La2-xSrxCuO4 (LSCO) intrinsic Josephson junction devices for the first time. Yui completed his PhD dessertation in March 2009.
Upon completion of his PhD and a short stay in the group of Prof. Youiti Ootuka at Tsukuba Research Center for Interdisciplinary Materials Science (TIMS) in the University, Yui moved to France and joined Quantronics Group at CEA-Saclay as a postdoctral scholar in June 2009. At Saclay, he worked on hybrid quantum devices consisting of superconducting circuits and impurity spins in diamond and silicon.
After spending a long time (six and a half years!) in France, he finally came back to the island where his mother was born and joined Quantum Dynamics Unit in the very end of 2015. Since then he is the PI of Hybrid Quantum Device Team, a subgroup in the QD Unit. He is pursuing a couple of projects on hybrid quantum devices, all of which are based on spins in solids (gem crystals). See also Research pages for the details.