التفاصيل البيبلوغرافية
| العنوان: |
Topological Effects in Chiral Symmetric Driven Systems |
| المؤلفون: |
Jiangbin Gong, Derek Y. H. Ho |
| بيانات النشر: |
arXiv, 2014. |
| سنة النشر: |
2014 |
| مصطلحات موضوعية: |
Physics, Floquet theory, Quantum Physics, Work (thermodynamics), Condensed Matter - Mesoscale and Nanoscale Physics, Band gap, FOS: Physical sciences, Condensed Matter Physics, Topology, Topological entropy in physics, Symmetry protected topological order, Electronic, Optical and Magnetic Materials, Quantum Gases (cond-mat.quant-gas), System parameters, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Matter wave, Condensed Matter - Quantum Gases, Quantum Physics (quant-ph), Topological quantum number |
| الوصف: |
Recent years have seen a strong interest in topological effects within periodically driven systems. In this work, we explore topological effects in two closely related 2-dimensional driven systems described by Floquet operators possessing chiral symmetry (CS). Our numerical and analytical results suggest the following. Firstly, the CS is associated with the existence of the anomalous counter-propagating (ACP) modes reported recently. Specifically, we show that a particular form of CS protects the ACP modes occurring at quasienergies of $\pm \pi$. We also find that these modes are only present along selected boundaries, suggesting that they are a weak topological effect. Secondly, we find that CS can give rise to protected $0$ and $\pi$ quasienergy modes, and that the number of these modes may increase without bound as we tune up certain system parameters. Like the ACP modes, these $0$ and $\pi$ modes also appear only along selected boundaries and thus appear to be a weak topological effect. To our knowledge, this work represents the first detailed study of weak topological effects in periodically driven systems. Our findings add to the still-growing knowledge on driven topological systems.
Comment: 37 pages, 5 figures, to appear in Physical Review B |
| DOI: |
10.48550/arxiv.1403.7262 |
| URL الوصول: |
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91f235d5f791616b87f26a1c9fa0fb43 |
| Rights: |
OPEN |
| رقم الانضمام: |
edsair.doi.dedup.....91f235d5f791616b87f26a1c9fa0fb43 |
| قاعدة البيانات: |
OpenAIRE |