Abstract

Topological protection of quantum correlations opens new horizons and opportunities in quantum technologies. A variety of topological effects has recently been observed in qubit networks. However, the experimental identification of the topological phase still remains challenging, especially in the entangled many-body case. Here, we propose an approach to independently probe single- and two-photon topological invariants from the time evolution of the two-photon state in a one-dimensional array of qubits. Extending the bulk-boundary correspondence to the two-photon scenario, we show that an appropriate choice of the initial state enables the retrieval of the topological invariant for the different types of the two-photon states in the interacting Su–Schrieffer–Heeger model. Our analysis of the Zak phase reveals additional facets of topological protection in the case of collapse of bound photon pairs.

© 2021 Optical Society of America

Probing one-dimensional topological phases in waveguide lattices with broken chiral symmetry

S. Longhi
Opt. Lett. 43(19) 4639-4642 (2018)

Experimental optimal generation of hybrid entangled states in photonic quantum walks

Si-Jing Tao, Qin-Qin Wang, Zhe Chen, Wei-Wei Pan, Shang Yu, Geng Chen, Xiao-Ye Xu, Yong-Jian Han, Chuan-Feng Li, and Guang-Can Guo
Opt. Lett. 46(8) 1868-1871 (2021)

Controllable photonic and phononic topological state transfers in a small optomechanical lattice

Lu Qi, Guo-Li Wang, Shutian Liu, Shou Zhang, and Hong-Fu Wang
Opt. Lett. 45(7) 2018-2021 (2020)

Topologically protecting quantum resources with sawtooth lattices

Wen-Hao Zhou, Xiao-Wei Wang, Jun Gao, Yong-Heng Lu, Zhi-Qiang Jiao, Ruo-Jing Ren, Tian-Huai Yang, Yi-Jun Chang, and Xian-Min Jin
Opt. Lett. 46(7) 1584-1587 (2021)

Square-root topological state of coupled plasmonic nanoparticles in a decorated Su–Schrieffer–Heeger lattice

Huizhou Wu, Guochao Wei, Zhenzhen Liu, and Jun-Jun Xiao
Opt. Lett. 46(17) 4256-4259 (2021)