Engineering topological chiral transport in a flat-band lattice of ultracold atoms

Hang Li; Qian Liang; Zhaoli Dong; Hongru Wang; Wei Yi; Jian-Song Pan; Bo Yan

doi:10.1038/s41377-025-02025-3

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Engineering topological chiral transport in a flat-band lattice of ultracold atoms

Original Articles

- Engineering topological chiral transport in a flat-band lattice of ultracold atoms
- Light: Science & Applications Vol. 14, Issue 11, Pages: 3517-3525(2025)
- Affiliations：
  
  1.Zhejiang Key Laboratory of Micro-nano Quantum Chips and Quantum Control, School of Physics, and State Key Laboratory for Extreme Photonics and Instrumentation, Zhejiang University, Hangzhou, China
  2.Laboratory of Quantum Information, University of Science and Technology of China, Hefei, China
  3.Anhui Province Key Laboratory of Quantum Network, University of Science and Technology of China, Hefei, China
  4.CAS Center For Excellence in Quantum Information and Quantum Physics, Hefei, China
  5.College of Physics and Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu, China
- Author bio：
  
  Jian-Song Pan (panjsong@scu.edu.cn)
  Bo Yan (yanbohang@zju.edu.cn)
- Funds：
- DOI：10.1038/s41377-025-02025-3
  CLC：
- Received：24 June 2025，
  
  Revised：2025-08-15，
  
  Accepted：21 August 2025，
  
  Published Online：17 September 2025，
  
  Published：30 November 2025
- Accepted：
Scan QR Code
Li, H. et al. Engineering topological chiral transport in a flat-band lattice of ultracold atoms. Light: Science & Applications, 14, 3517-3525 (2025).
DOI：

Li, H. et al. Engineering topological chiral transport in a flat-band lattice of ultracold atoms. Light: Science & Applications, 14, 3517-3525 (2025). DOI： 10.1038/s41377-025-02025-3.

摘要

Abstract

The manipulation of particle transport in synthetic quantum matter is an active research frontier for its theoretical importance and potential applications. Here we experimentally demonstrate an engineered topological transport in a synthetic flat-band lattice of ultracold

Rb atoms. We implement a quasi-one-dimensional rhombic chain with staggered flux in the momentum space of the atomic condensate and observe biased local oscillations that originate from the flat-band localization under the staggere

d synthetic flux. Based on these features

we design and experimentally confirm a state-dependent chiral transport under the periodic modulation of the synthetic flux. We show that the phenomenon is associated with the topology of the Floquet Bloch bands of a coarse-grained effective Hamiltonian. Our work opens the new avenue for exploring flat-band-assistant topological transport with ultracold atoms

and offers a new strategy for designing efficient quantum device with topological robustness.

关键词

Keywords

references

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