3 papers
cond-mat.stat-mech2020
Time Crystals Protected by Floquet Dynamical Symmetry in Hubbard Models
Koki Chinzei, Tatsuhiko N. Ikeda
We investigate an unconventional symmetry in time-periodically driven systems, the Floquet dynamical symmetry (FDS). Unlike the usual symmetries, the FDS gives symmetry sectors tha…
cond-mat.dis-nn2019
Disorder Effects on the Origin of High-Order Harmonic Generation in Solids
Koki Chinzei, Tatsuhiko N. Ikeda
We consider noninteracting electrons coupled to laser fields, and study perturbatively the effects of the lattice potential involving disorder on the harmonic components of the ele…
cond-mat.other2018
Floquet-Theoretical Formulation and Analysis of High-Harmonic Generation in Solids
Tatsuhiko N. Ikeda, Koki Chinzei, Hirokazu Tsunetsugu
By using the Floquet eigenstates, we derive a formula to calculate the high-harmonic components of the electric current (HHC) in the setup where a monochromatic laser field is turn…