Floquet Bound States in a Driven Two-Particle Bose–Hubbard Model with an Impurity

doi:10.1088/0256-307X/34/7/070304

Chin. Phys. Lett.

2017, Vol. 34

Issue (7): 070304 DOI: 10.1088/0256-307X/34/7/070304

GENERAL

Floquet Bound States in a Driven Two-Particle Bose–Hubbard Model with an Impurity

Hong-Hua Zhong^1,2, Zheng Zhou^1,3, Bo Zhu¹, Yong-Guan Ke¹, Chao-Hong Lee^1**

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

Cite this article:

Hong-Hua Zhong, Zheng Zhou, Bo Zhu et al 2017 Chin. Phys. Lett. 34 070304

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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.

Received: 26 April 2017 Published: 23 June 2017

PACS:	03.65.Ge	(Solutions of wave equations: bound states)
	71.27.+a	(Strongly correlated electron systems; heavy fermions)
	71.10.Fd	(Lattice fermion models (Hubbard model, etc.))

Fund: Supported by the National Natural Science Foundation of China under Grants Nos 11374375, 11574405, 11465008 and 11547125, the Hunan Provincial Natural Science Foundation under Grant Nos 2015JJ4020 and 2015JJ2114, and the Scientific Research Fund of Hunan Provincial Education Department under Grant No 14A118.

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https://cpl.iphy.ac.cn/10.1088/0256-307X/34/7/070304 OR https://cpl.iphy.ac.cn/Y2017/V34/I7/070304

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	Hong-Hua Zhong
	Zheng Zhou
	Bo Zhu
	Yong-Guan Ke
	Chao-Hong Lee

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