Revealing charge-tunneling processes between a quantum dot and a superconducting island through gate sensing

Jasper Van Veen, Damaz De Jong, Lin Han, Christian Prosko, Peter Krogstrup, John D. Watson, Leo P. Kouwenhoven, Wolfgang Pfaff

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
113 Downloads (Pure)

Abstract

We report direct detection of charge tunneling between a quantum dot and a superconducting island through radio-frequency gate sensing. We are able to resolve spin-dependent quasiparticle tunneling as well as two-particle tunneling involving Cooper pairs. The quantum dot can act as an RF-only sensor to characterize the superconductor addition spectrum, enabling us to access subgap states without transport. Our results provide guidance for future dispersive parity measurements of Majorana modes, which can be realized by detecting the parity-dependent tunneling between dots and islands.

Original languageEnglish
Article number174508
Number of pages6
JournalPhysical Review B
Volume100
Issue number17
DOIs
Publication statusPublished - 2019

Fingerprint

Dive into the research topics of 'Revealing charge-tunneling processes between a quantum dot and a superconducting island through gate sensing'. Together they form a unique fingerprint.

Cite this