Lucien is a mathematician interested in the theory of cyber-physical systems, which include large-scale networks like the power grid and the Internet of Things. His goals are to advance the mathematics that underlie these systems and accelerate the adoption of renewable sources that contribute to sustainable energy production. His past research has been on the dynamics of vegetation pattern formation in arid ecosystems threatened by desertification, drought, and human encroachment. Outside of mathematics, Lucien has a career as a cellist and continues to perform around the world--often with his three sisters who are all also musicians and mathematicians. Prior to joining Caltech, he received degrees in mathematics, music, and politics from Northwestern, Harvard, and Montana State University.