Gorm O. Steffensen

Abstract Protecting qubits from noise is essential for building reliable quantum computers. Topological qubits offer a route to this goal by encoding quantum information non-locally, using pairs of Majorana zero modes. These modes form a shared fermionic state whose occupation—either even or odd—defines the fermionic parity that encodes the qubit1. Notably, this parity can only be accessed by a measurement that couples two Majoranas to each other.

Superconductors, which carry electrical current without dissipation, are central to advanced technologies such as superconducting diodes and qubits. A key component in these systems is the Josephson junction, which relies on a weak link between superconducting regions. In this study, we explore a highly tunable Josephson junction where the weak link is formed by an artificial atom—a semiconducting quantum dot.

Download Hi-Res ImageDownload to MS-PowerPointCite This:Nano Lett. 2024, XXXX, XXX RETURN TO ARTICLES ASAPPREVLetterNEXT Ángel Ibabe Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, E-28049 Madrid, Spain , Gorm O.