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Nano-assembled open quantum dot nanotube devices

Althuon, Tim 1; Cubaynes, Tino 2; Auer, Aljoscha 1; Sürgers, Christoph ORCID iD icon 1; Wernsdorfer, Wolfgang 1,2
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)
2 Institut für QuantenMaterialien und Technologien (IQMT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

A pristine suspended carbon nanotube is a near ideal environment to host long-lived quantum states. For this reason, they have been used as the core element of qubits and to explore numerous condensed matter physics phenomena. One of the most advanced technique to realize complex carbon nanotube based quantum circuits relies on a mechanical integration of the nanotube into the circuit. Despite the high-quality and complexity of the fabricated circuits, the range of possible experiments was limited to the closed quantum dot regime. Here, by engineering a transparent metal-nanotube interface, we developed a technique that overcomes this limitation. We reliably reach the open quantum dot regime as demonstrated by measurements of Fabry-Perot interferences and Kondo physics in multiple devices. A circuit-nanotube alignment precision of ± 200 nm is demonstrated. Our technique allows to envision experiments requiring the combination of complex circuits and strongly coupled carbon nanotubes such as the realization of carbon nanotube superconducting qubits or flux-mediated optomechanics experiments.


Verlagsausgabe §
DOI: 10.5445/IR/1000167228
Veröffentlicht am 12.01.2024
Originalveröffentlichung
DOI: 10.1038/s43246-023-00439-3
Scopus
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für QuantenMaterialien und Technologien (IQMT)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 05.02.2024
Sprache Englisch
Identifikator ISSN: 2662-4443
KITopen-ID: 1000167228
HGF-Programm 47.12.01 (POF IV, LK 01) Advanced Solid-State Qubits and Qubit Systems
Erschienen in Communications Materials
Verlag Springer Nature
Band 5
Seiten Article no: 5
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Dimensions
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