Ground-state quantum geometry in superconductor-quantum dot chains
| Autor: | Raffael L. Klees, Juan Carlos Cuevas, Gianluca Rastelli, Wolfgang Belzig |
|---|---|
| Přispěvatelé: | UAM. Departamento de Física Teórica de la Materia Condensada |
| Rok vydání: | 2021 |
| Předmět: |
Josephson effect
FOS: Physical sciences 02 engineering and technology 01 natural sciences Topology Superconductivity (cond-mat.supr-con) Quantum Hall Effect Quantum mechanics Condensed Matter::Superconductivity 0103 physical sciences Bound state Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Tensor 010306 general physics Quantum Topology (chemistry) Physics Quantum geometry Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity Física 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Topological Insulators Quantum dot 0210 nano-technology Ground state |
| Zdroj: | Biblos-e Archivo. Repositorio Institucional de la UAM instname |
| Popis: | Multiterminal Josephson junctions constitute engineered topological systems in arbitrary synthetic dimensions defined by the superconducting phases. Microwave spectroscopy enables the measurement of the quantum geometric tensor, a fundamental quantity describing both the quantum geometry and the topology of the emergent Andreev bound states in a unified manner. In this work we propose an experimentally feasible multiterminal setup of $N$ quantum dots connected to $N+1$ superconducting leads to study nontrivial topology in terms of the many-body Chern number of the ground state. Moreover, we generalize the microwave spectroscopy scheme to the multiband case and show that the elements of the quantum geometric tensor of the noninteracting ground state can be experimentally accessed from the measurable oscillator strengths at low temperature. Comment: 13 pages, 4 figures, added and updated references, corrected typos, changed title; content corresponds to the published version |
| Databáze: | OpenAIRE |
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