Frequency comparisons of Sr, Yb, and Hg based optical lattice clocks and their applications
Hidetoshi Katori, Ichiro Ushijima, Manoj Das, Nils Nemitz, T. Ohkubo, K. Yamanaka, Noriaki Ohmae, T. Takano, Tomoya Akatsuka, Atsushi Yamaguchi, Masao Takamoto