Charge Sensing the Parity of an Andreev Molecule
D. Van Driel (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - Business Development)
B. Roovers (Kavli institute of nanoscience Delft, TU Delft - Medical Instruments & Bio-Inspired Technology, TU Delft - QuTech Advanced Research Centre)
F. Zatelli (TU Delft - QRD/Kouwenhoven Lab, Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre)
Alberto Bordin (Kavli institute of nanoscience Delft, TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Kouwenhoven Lab)
Guanzhong Wang (TU Delft - QuTech Advanced Research Centre, TU Delft - QRD/Wimmer Group, Kavli institute of nanoscience Delft)
N. Van Loo (Kavli institute of nanoscience Delft, TU Delft - QRD/Kouwenhoven Lab, TU Delft - QuTech Advanced Research Centre)
Jan Cornelis Wolff (TU Delft - QRD/Kouwenhoven Lab, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
G. P. Mazur (Kavli institute of nanoscience Delft, TU Delft - QRD/Wimmer Group, TU Delft - QuTech Advanced Research Centre)
Leo Kouwenhoven (TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, TU Delft - QN/Kouwenhoven Lab)
T. Dvir (TU Delft - Qubit Research Division, TU Delft - QuTech Advanced Research Centre, Kavli institute of nanoscience Delft)
More authors (External organisation)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
The proximity effect of superconductivity on confined states in semiconductors gives rise to various bound states such as Andreev bound states, Andreev molecules, and Majorana zero modes. While such bound states do not conserve charge, their fermion parity is a good quantum number. One way to measure parity is to convert it to charge first, which is then sensed. In this work, we sense the charge of Andreev bound states and Andreev molecules in an InSb-Al hybrid nanowire using an integrated quantum dot operated as a charge sensor. We show how charge sensing measurements can resolve the even and odd states of an Andreev molecule, without affecting the parity. Such an approach can be further used for parity measurements of Majorana zero modes in Kitaev chains based on quantum dots.