تقرير
Topological phase detection through high-harmonic spectroscopy in extended Su-Schrieffer-Heeger chains
| العنوان: | Topological phase detection through high-harmonic spectroscopy in extended Su-Schrieffer-Heeger chains |
|---|---|
| المؤلفون: | Bera, Mohit Lal, de Almeida, Jessica O., Dziurawiec, Marlena, Płodzień, Marcin, Maśka, Maciej M., Lewenstein, Maciej, Grass, Tobias, Bhattacharya, Utso |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics, Quantum Physics |
| الوصف: | Su-Schrieffer-Heeger (SSH) chains are paradigmatic examples of 1D topological insulators hosting zero-energy edge modes when the bulk of the system has a non-zero topological winding invariant. Recently, high-harmonic spectroscopy has been suggested as a tool for detecting the topological phase. Specifically, it has been shown that when the SSH chain is coupled to an external laser field of a frequency much smaller than the band gap, the emitted light at harmonic frequencies strongly differs between the trivial and the topological phase. However, it remains unclear whether various non-trivial topological phases -- differing in the number of edge states -- can also be distinguished by the high harmonic generation (HHG). In this paper, we investigate this problem by studying an extended version of the SSH chain with extended-range hoppings, resulting in a topological model with different topological phases. We explicitly show that HHG spectra are a sensitive and suitable tool for distinguishing topological phases when there is more than one topological phase. We also propose a quantitative scheme based on tuning the filling of the system to precisely locate the number of edge modes in each topological phase of this chain. Comment: 9 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2305.02025Test |
| رقم الانضمام: | edsarx.2305.02025 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |