Experimental observation of topological quantum criticality
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. Published by the American Physical Society 2024
Authors
- Tobias Micklitz (ORCID: https://orcid.org/0000-0002-0459-0234)
- Sonja Barkhofen (ORCID: https://orcid.org/0000-0003-3978-1257)
- Christine Silberhorn (ORCID: https://orcid.org/0000-0002-2349-5443)
- Jan Sperling (ORCID: https://orcid.org/0000-0002-5844-3205)
- Dmitry Bagrets (ORCID: https://orcid.org/0000-0002-3985-4834)
- Alexander Altland (ORCID: https://orcid.org/0000-0002-2991-4805)
- Syamsundar De (ORCID: https://orcid.org/0000-0002-8598-6395)
- Kun Woo Kim (ORCID: https://orcid.org/0000-0002-7784-6202)
Institutions
- University of Cologne (DE)
- Paderborn University (DE)
- Centro Brasileiro de Pesquisas Físicas (BR)
- Chung-Ang University (KR)
Publication Details
- Journal
- Physical Review Research
- Published
- 2024-08-21
- DOI
- https://doi.org/10.1103/physrevresearch.6.033194
- Citations
- 2
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.34
Funders
- National Research Foundation
- Deutsche Forschungsgemeinschaft
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- National Research Foundation of Korea
- Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro
- Ministry of Science and ICT, South Korea
- European Research Council