Topological edge states in Rashba-Dresselhaus spin-orbit-coupled atoms in a Zeeman lattice

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Topological edge states in Rashba-Dresselhaus spin-orbit-coupled atoms in a Zeeman lattice

C. Li, F. Ye, X. Chen, Y. V. Kartashov, L. Torner, and V. V. Konotop

Phys. Rev. A 98, 061601(R) – Published 7 December 2018

Abstract

We address the impact of spin-orbit coupling on the existence and properties of topological edge states of cold neutral atoms and Bose-Einstein condensates loaded in honeycomb Zeeman lattices—lattices where the spinor components are placed in potentials having opposite signs. We find that the type of spin-orbit-coupling mechanism has profound effect on the emergence of topological edge states. We also reveal that edge states persist when interatomic interactions are present and that they become metastable in Bose-Einstein condensates.

Received 5 February 2018

DOI:https://doi.org/10.1103/PhysRevA.98.061601

Physics Subject Headings (PhySH)

Cold atoms & matter waves Spin-orbit coupling Topological phases of matter

General Physics

Authors & Affiliations

C. Li^1,2, F. Ye^1,*, X. Chen¹, Y. V. Kartashov^3,4, L. Torner^3,5, and V. V. Konotop⁶

¹Key Laboratory for Laser Plasma (Ministry of Education), Collaborative Innovation Center of IFSA, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
²School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
³ICFO–Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
⁴Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow Region 108840, Russia
⁵Universitat Politecnica de Catalunya, 08034 Barcelona, Spain
⁶Centro de Física Teórica e Computacional and Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8, Lisboa 1749-016, Portugal

^*Corresponding author: fangweiye@sjtu.edu.cn

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Issue

Vol. 98, Iss. 6 — December 2018

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