Floquet Bound States in a Driven Two-Particle Bose–Hubbard Model with an Impurity
Hong-Hua Zhong1,2, Zheng Zhou1,3, Bo Zhu1, Yong-Guan Ke1, Chao-Hong Lee1**
1TianQin Research Center and School of Physics and Astronomy, Sun Yat-Sen University (Zhuhai Campus), Zhuhai 519082 2School of Physics and Electronics, Central South University, Changsha 410083 3Department of Physics, Hunan Institute of Technology, Hengyang 421002
Abstract：We investigate how the driving field affects the bound states in the one-dimensional two-particle Bose–Hubbard model with an impurity. In the high-frequency regime, compared with the static lattice [Phys. Rev. Lett. 109 (2012) 116405], a new type of Floquet bound state can be obtained even for a weak particle–particle interaction by tuning the driving amplitude. Moreover, the localization degree of the Floquet bound molecular state can be adjusted by tuning the driving frequency, and even the Floquet bound molecular state can be changed into the Floquet extended state when the driving frequency is below a critical value. Our results provide an efficient way to manipulate bound states in the many-body systems.
. [J]. 中国物理快报, 2017, 34(7): 70304-.
Hong-Hua Zhong, Zheng Zhou, Bo Zhu, Yong-Guan Ke, Chao-Hong Lee. Floquet Bound States in a Driven Two-Particle Bose–Hubbard Model with an Impurity. Chin. Phys. Lett., 2017, 34(7): 70304-.
2017, Vol. 34 
