Bogoliubov excitations in a Bose–Hubbard model on a hyperhoneycomb lattice

Zhou Wen-yan¹, Wu Ya-jie², Kou Su-Peng^{1, †}

(color online) (a) The energy spectra of quasiparticle and quasihole excitations with fixed and at the MI–SF transition point. (b) The energy spectra of quasiparticle and quasihole excitations with fixed and in the MI(1,1,1,1) phase.