تقرير
Observation of Quantum metric and non-Hermitian Berry curvature in a plasmonic lattice
| العنوان: | Observation of Quantum metric and non-Hermitian Berry curvature in a plasmonic lattice |
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| المؤلفون: | Cuerda, Javier, Taskinen, Jani M., Källman, Nicki, Grabitz, Leo, Törmä, Päivi |
| المصدر: | Physical Review Research 6, L022020 (2024) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We experimentally observe the quantum geometric tensor, namely the quantum metric and the Berry curvature, for a square lattice of radiatively coupled plasmonic nanoparticles. We observe a non-zero Berry curvature and show that it arises solely from non-Hermitian effects. The quantum metric is found to originate from a pseudospin-orbit coupling. The long-range nature of the radiative interaction renders the behavior distinct from tight-binding systems: Berry curvature and quantum metric are centered around high-symmetry lines of the Brillouin zone instead of high-symmetry points. Our results inspire new pathways in the design of topological systems by tailoring losses or gain. Comment: Revised version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevResearch.6.L022020 |
| URL الوصول: | http://arxiv.org/abs/2305.13174 |
| رقم الأكسشن: | edsarx.2305.13174 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevResearch.6.L022020 |
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