Experimental observation of topological quantum criticality

被引：1

作者：

Barkhofen, Sonja ^{[1
]}

De, Syamsundar ^{[1
]}

Sperling, Jan ^{[1
]}

Silberhorn, Christine ^{[1
]}

Altland, Alexander ^{[2
]}

Bagrets, Dmitry ^{[2
]}

Kim, Kun Woo ^{[3
]}

Micklitz, Tobias ^{[4
]}

机构：

[1] Paderborn Univ, Inst Photon Quantum Syst PhoQS, Integrated Quantum Opt Grp, Warburger Str 100, D-33098 Paderborn, Germany

[2] Univ Cologne, Inst Theoret Phys, Zulpicher Str 77, D-50937 Cologne, Germany

[3] Chung Ang Univ, Dept Phys, Seoul 06974, South Korea

[4] Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil

来源：

PHYSICAL REVIEW RESEARCH | 2024年 / 6卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

SYMMETRY CLASSES; LOCALIZATION; DIFFUSION; ABSENCE;

D O I：

10.1103/PhysRevResearch.6.033194

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on a photonic simulator of the critical state forming at the quantum phase transition between topologically distinct Anderson insulator phases. We observe a time-staggered profile in the circular photon polarization, which originates from the interplay of a chiral and sublattice symmetry, and has recently been suggested as a signature for topological Anderson criticality within the setup. We discuss the role of statistical detuning from criticality and show that the controlled breaking of phase coherence removes the signal, revealing its origin in quantum coherence.

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页数：5

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