Work

Instabilities of a Bose-Einstein condensate with mixed nonlinear and linear lattices

Year: 2023

Type: article

Abstract: Bose-Einstein condensates (BECs) in periodic potentials generate interesting physics on the instabilities of Bloch states. The lowest-energy Bloch states of BECs in pure nonlinear lattices are dynamically and Landau unstable, which breaks down BEC superfluidity. In this paper we propose to use an out-of-phase linear lattice to stabilize them. The stabilization mechanism is revealed by the averaged interaction. We further incorporate a constant interaction into BECs with mixed nonlinear and linear lattices and reveal its effect on the instabilities of Bloch states in the lowest band.

Source: Physical review. E

DOI: 10.1103/physreve.107.044219

Authors: Jun Hong, Chenhui Wang, Yongping Zhang

Institution: Shanghai University

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Awards: G2672763889, 自旋轨道耦合的玻色爱因斯坦凝聚的属性研究