Development of Electrical Quantum Circuitry for Quantum Information Technologies in Brazil

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, we will showcase the results from the fabrication and measurement of a superconducting qubit developed in our laboratory and a set of fabrication facilities in Brazil. We will discuss the latest outcomes from this promising project. 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.

Bio

Francisco Paulo Marques Rouxinol received his B.Sc., M.Sc., and Ph.D. degrees in Physics from the Universidade Estadual de Campinas (UNICAMP), Brazil, completing his doctoral studies in 2008 with a focus on magnetic properties of thin films. He then pursued postdoctoral research at Syracuse University, NY, USA, from 2010 to 2015, supported by The National Science Foundation, where he advanced his expertise in quantum circuits and nanomechanical systems. Dr. Rouxinol is currently a Professor at UNICAMP’s Institute of Physics Gleb Wataghin, specializing in the fields of quantum circuit electrodynamics, superconducting devices, and nanomechanics.

Dr. Rouxinol's research interests include the development of hardware and software for low-noise measurements at RF/microwave frequencies and the integration of novel quantum devices. His significant contributions span both theoretical and experimental physics, with a particular focus on quantum measurements, qubit-resonator systems, and hybrid quantum systems. His work has led to innovative approaches in quantum sensing and the manipulation of quantum states, enriching the understanding of quantum coherence and entanglement in macroscopic systems.

Throughout his career, Dr. Rouxinol has been involved in several high-impact projects, including leading roles in projects aimed at developing new microelectronic devices and processes for quantum computing applications. He has collaborated extensively with international research groups and industries, enhancing the practical applications of quantum technologies. Dr. Rouxinol has published numerous articles in prestigious journals and has been an active member of the scientific community, serving as a reviewer for several high-profile scientific journals and as a member of various academic committees.