Cyclotron dynamics of neutral atoms in optical lattices with additional magnetic field and harmonic trap potential

doi:10.1088/1674-1056/ab5efc

Abstract We analytically and numerically discuss the stability and dynamics of neutral atoms in a two-dimensional optical lattice subjected to an additional harmonic trap potential and artificial magnetic field. The harmonic trap potential plays a key role in modifying the equilibrium state properties of the system and stabilizing the cyclotron orbits of the condensate. Meanwhile, the presence of the harmonic trap potential and lattice potential results in rich cyclotron dynamics of the condensate. The coupling effects of lattice potential, artificial magnetic field, and harmonic trap potential lead to single periodic, multi-periodic or quasi-periodic cyclotron orbits of the condensate. So we can control the cyclotron dynamics of neutral atoms in optical lattice by manipulating the strength of harmonic confinement, artificial magnetic field, and initial conditions. Our results provide a direct theoretical evidence for the cyclotron dynamics of neutral atoms in optical lattices exposed to the artificial gauge magnetic field and harmonic trap potential.

Keywords: Bose-Einstein condensate artificial magnetic field optical lattice

Received: 23 August 2019
Revised: 28 November 2019
Accepted manuscript online:

PACS:	03.75.Lm	(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
	03.75.Mn	(Multicomponent condensates; spinor condensates)
	05.45.Yv	(Solitons)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11764039, 11847304, 11865014, 11475027, 11305132, and 11274255), the Natural Science Foundation of Gansu Province, China (Grant No. 17JR5RA076), and the Scientific Research Project of Gansu Higher Education Department, China (Grant No. 2016A-005).

Corresponding Authors: Ai-Xia Zhang, Ju-Kui Xue
E-mail: zhangax@nwnu.edu.cn;xuejk@nwnu.edu.cn

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Ai-Xia Zhang(张爱霞), Ying Zhang(张莹), Yan-Fang Jiang(姜艳芳), Zi-Fa Yu(鱼自发), Li-Xia Cai(蔡丽霞), Ju-Kui Xue(薛具奎) Cyclotron dynamics of neutral atoms in optical lattices with additional magnetic field and harmonic trap potential 2020 Chin. Phys. B 29 010307

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Cyclotron dynamics of neutral atoms in optical lattices with additional magnetic field and harmonic trap potential

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