Publikation: Microwave spectroscopy reveals the quantum geometric tensor of topological Josephson matter
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2020
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Physical Review Letters. American Physical Society (APS). 2020, 124(19), 197002. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.124.197002
Zusammenfassung
Quantization effects due to topological invariants such as Chern numbers have become very relevant in many systems, yet key quantities such as the quantum geometric tensor providing local information about quantum states remain experimentally difficult to access. Recently, it has been shown that multiterminal Josephson junctions constitute an ideal platform to synthesize topological systems in a controlled manner. We theoretically study properties of Andreev states in topological Josephson matter and demonstrate that the quantum geometric tensor of Andreev states can be extracted by synthetically polarized microwaves. The oscillator strength of the absorption rates provides direct evidence of topological quantum properties of the Andreev states.
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KLEES, Raffael L., Gianluca RASTELLI, Juan Carlos CUEVAS, Wolfgang BELZIG, 2020. Microwave spectroscopy reveals the quantum geometric tensor of topological Josephson matter. In: Physical Review Letters. American Physical Society (APS). 2020, 124(19), 197002. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.124.197002BibTex
@article{Klees2020Micro-43654.2,
year={2020},
doi={10.1103/PhysRevLett.124.197002},
title={Microwave spectroscopy reveals the quantum geometric tensor of topological Josephson matter},
number={19},
volume={124},
issn={0031-9007},
journal={Physical Review Letters},
author={Klees, Raffael L. and Rastelli, Gianluca and Cuevas, Juan Carlos and Belzig, Wolfgang},
note={Article Number: 197002}
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<dcterms:abstract xml:lang="eng">Quantization effects due to topological invariants such as Chern numbers have become very relevant in many systems, yet key quantities such as the quantum geometric tensor providing local information about quantum states remain experimentally difficult to access. Recently, it has been shown that multiterminal Josephson junctions constitute an ideal platform to synthesize topological systems in a controlled manner. We theoretically study properties of Andreev states in topological Josephson matter and demonstrate that the quantum geometric tensor of Andreev states can be extracted by synthetically polarized microwaves. The oscillator strength of the absorption rates provides direct evidence of topological quantum properties of the Andreev states.</dcterms:abstract>
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