Measuring Zak phase in room-temperature atoms

Ruosong Mao; Xingqi Xu; Jiefei Wang; Chenran Xu; Gewei Qian; Han Cai; Shi-Yao Zhu; Da-Wei Wang

doi:10.1038/s41377-022-00990-7

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Measuring Zak phase in room-temperature atoms

Original Articles

- Measuring Zak phase in room-temperature atoms
- Measuring Zak phase in room-temperature atoms
- LSA 2022年11卷第10期页码：2530-2539
- Affiliations：
  
  1.Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, and Zhejiang Province Key Laboratory of Quantum Technology and Device, School of Physics, Zhejiang University, Hangzhou 310027, China
  2.College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
  3.Hefei National Laboratory, Hefei 230088, China
  4.CAS Center of Excellence in Topological Quantum Computation, 100190 Beijing, China
- Author bio：
  
  Han Cai (hancai@zju.edu.cn)
  Da-Wei Wang (dwwang@zju.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-00990-7
  中图分类号：
- 纸质出版日期：2022-10-31，
  
  网络出版日期：2022-10-09，
  
  收稿日期：2022-05-23，
  
  修回日期：2022-09-20，
  
  录用日期：2022-09-21
- Accepted：
Scan QR Code
Measuring Zak phase in room-temperature atoms[J]. LSA, 2022,11(10):2530-2539.

Mao, R. S. et al. Measuring Zak phase in room-temperature atoms. Light: Science & Applications, 11, 2530-2539 (2022).
Measuring Zak phase in room-temperature atoms[J]. LSA, 2022,11(10):2530-2539. DOI： 10.1038/s41377-022-00990-7.

Mao, R. S. et al. Measuring Zak phase in room-temperature atoms. Light: Science & Applications, 11, 2530-2539 (2022). DOI： 10.1038/s41377-022-00990-7.

摘要

Abstract

Cold atoms provide a flexible platform for synthesizing and characterizing topological matter

where geometric phases play a central role. However

cold atoms are intrinsically prone to thermal noise

which can overwhelm the topological response and hamper promised applications. On the other hand

geometric phases also determine the energy spectra of particles subjected to a static force

based on the polarization relation between Wannier-Stark ladders and geometric Zak phases. By exploiting this relation

we develop a method to extract geometric phases from energy spectra of room-temperature superradiance lattices

which are momentum-space lattices of timed Dicke states. In such momentum-space lattices the thermal motion of atoms

instead of being a source of noise

provides effective forces which lead to spectroscopic signatures of the Zak phases. We measure Zak phases directly from the anti-crossings between Wannier-Stark ladders in the Doppler-broadened absorption spectra of superradiance lattices. Our approach paves the way of measuring topological invariants and developing their applications in room-temperature atoms.

关键词

Keywords

references

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