دورية أكاديمية
Topological charge pumping in tetramerized Kitaev chains with nodal loop in parameter space
| العنوان: | Topological charge pumping in tetramerized Kitaev chains with nodal loop in parameter space |
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| المؤلفون: | E S Ma, Z Song |
| المصدر: | New Journal of Physics, Vol 26, Iss 6, p 063036 (2024) |
| بيانات النشر: | IOP Publishing, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Science LCC:Physics |
| مصطلحات موضوعية: | pumping charge, topological superconductors, nodal line, Kitaev chain model, Rice–Mele model, Science, Physics, QC1-999 |
| الوصف: | We investigated the topological pumping charge of a tetramerized Kitaev chain with spatially modulated chemical potential, which hosts nodal loops in parameter space and violates particle number conservation. In the simplest case, with alternatively assigned hopping and pairing terms, we show that the model can be mapped into the Rice–Mele model by a partial particle-hole transformation and subsequently supports topological charge pumping as a demonstration of the Chern number for the ground state. Beyond this special case, analytic analysis shows that the nodal loops are conic curves. Numerical simulation of a finite-size chain indicates that the pumping charge is zero for a quasiadiabatic loop within the nodal loop and is ±1 for a quasiadiabatic passage enclosing the nodal loop. Our findings unveil the topology of Kitaev chains in parameter space. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1367-2630 |
| Relation: | https://doaj.org/toc/1367-2630 |
| DOI: | 10.1088/1367-2630/ad56c1 |
| URL الوصول: | https://doaj.org/article/f53bf6f8c046419c8062fe9f77a3c113 |
| رقم الأكسشن: | edsdoj.f53bf6f8c046419c8062fe9f77a3c113 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 13672630 |
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| DOI: | 10.1088/1367-2630/ad56c1 |