Events

   Development of Electrical Quantum Circuitry for Quantum Information Technologies in Brazil

Francisco Rouxinol (Gleb Wataghin Institute of Physics)

Date/Time: Tuesday, 23rd September 2025 at 2:00 pm

Place: Room Rémy Lemaire K223, Institut Néel

Abstract: Superconducting quantum computing is an actively progressing field focused on developing Josephson-junction-based qubits and superconducting circuits. This technology aims to establish a scalable architecture for quantum information processing, enabling the development of advanced sensors and deepening our understanding of quantum mechanics fundamentals. Significant progress in qubit design and the fabrication of superconducting electromagnetic circuits has been instrumental in creating foundational devices necessary for constructing quantum computing systems and sensing applications. In this seminar, I will present results from the fabrication and measurement of a superconducting qubit developed in our laboratory, as well as from a set of fabrication facilities in Brazil. I will also discuss the latest outcomes from this national effort. The project includes the measurement of a superconducting chip equipped with a transmon-type qubit, utilizing home-built instrumentation to implement time-domain microwave measurement techniques. This work exemplifies successful collaboration among various research groups in Brazil.