| Autor: |
J H Ungerer, P Chevalier Kwon, T Patlatiuk, J Ridderbos, A Kononov, D Sarmah, E P A M Bakkers, D Zumbühl, C Schönenberger |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Materials for Quantum Technology, Vol 3, Iss 3, p 031001 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2633-4356 |
| DOI: |
10.1088/2633-4356/ace2a6 |
| Popis: |
Spin qubits in germanium are a promising contender for scalable quantum computers. Reading out of the spin and charge configuration of quantum dots formed in Ge/Si core/shell nanowires is typically performed by measuring the current through the nanowire. Here, we demonstrate a more versatile approach on investigating the charge configuration of these quantum dots. We employ a high-impedance, magnetic-field resilient superconducting resonator based on NbTiN and couple it to a double quantum dot in a Ge/Si nanowire. This allows us to dispersively detect charging effects, even in the regime where the nanowire is fully pinched off and no direct current is present. Furthermore, by increasing the electro-chemical potential far beyond the nanowire pinch-off, we observe indications for depleting the last hole in the quantum dot by using the second quantum dot as a charge sensor. This work opens the door for dispersive readout and future spin-photon coupling in this system. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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