Bertrand Reulet

Bertrand Reulet

Canada Excellence Research Chair in Quantum Signal Processing

Université de Sherbrooke

“Dr. Reulet’s interdisciplinary approach will bring together experimental and theoretical physicists. With his arrival, the Université de Sherbrooke will be positioned as one of the leading global institutions in quantum computing.”

― Luce Samoisette, rector, Université de Sherbrooke


Bertrand Reulet is a world leader in researching quantum and non-Gaussian noise. He has participated in multiple investigative projects, such as the study of superconductivity in carbon nanotubes, and has developed innovations in experimental design, including devices to measure non-Gaussian noise or noise dynamics.

Before becoming Canada Excellence Research Chair at the Université de Sherbrooke, Reulet was director of research at the Centre national de la recherche scientifique, in the Laboratoire de physique des solides at the Université Paris-Sud XI, France. He has also served as professor at the École Polytechnique, and spent four years at the Department of Applied Physics at Yale University, where he started his work on non-Gaussian noise in nanostructures.

A former student of the École normale supérieure (Paris), Reulet holds a PhD from the Université Paris-Sud XI. In 2008, he was awarded the Prix Anatole and Suzanne Abragam from the Académie des sciences de l’Institut de France for the “originality in the conception and elegance in the execution” of his pioneering work on non-Gaussian noise, laid out in his publication “Environmental Effects in the Third Moment of Voltage Fluctuations in a Tunnel Junction” in the esteemed journal Physical Review Letters.

Defining the Future of Quantum Applications

Right now, solid-state physics—the branch of physics that deals with electromagnetism, thermodynamics and the structural properties of solid materials—offers the most promising path to building a quantum information processor. Canada Excellence Research Chair in Quantum Signal Processing Bertrand Reulet is currently working towards engineering the first generation of quantum information processors by tackling the biggest obstacle currently facing quantum computing pioneers—electronic noise.

Building on his significant research accomplishments on noise to date, Reulet will explore the mechanisms at the origin of electronic noise at very low temperature in the simple metallic and superconductive nanostructures (quantum wires, junctions, etc.) that constitute the building blocks of future quantum processors. He will also study how the quantum properties of the signals that come from such devices can be processed by classical instruments. His experiments will shed new light on how quantum processors could be read out by current computers.

As a result, Reulet’s research will advance information technology, especially microelectronics. The tools he is building to precisely analyze electronic noise will be applied to current microelectronic components, potentially offering new possibilities for improvement. Moreover, the concepts and methods that Reulet is developing to understand the subtleties of quantum signals may also offer new ways to analyze and encode information in current communication networks.



Release date

October 11, 2011

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Bertrand Reulet, Université de Sherbrooke

The subject that interests me is what we call electronic “noise,” which means fluctuations in electrical current. My goal isn't necessarily to reduce these fluctuations, but to understand them—to understand what is the quantum signal portion within the classical signal, and to develop tools that can focus solely on the quantum portion without being contaminated by the classical portion.

This chair will allow me to conduct experiments that apply the ideas I have been developing over the past few years and am still developing. It will do so in various ways. First of all, before you can do research, you have to have ideas. But ideas don't always come from you alone. They often come from discussions with other researchers, and, at Sherbrooke, there is a very, very good group of quantum information researchers with whom I hope to have very good relations and lots of discussions—discussions that I have already begun, of course.

There is also a very important practical consideration. Carrying out these experiments will require a lot of resources, and a lot of people who want to do research on this subject. This CERC provides tremendous resources for carrying out ambitious experiments, and that's really wonderful. Also, I have learned that Sherbrooke has very, very good students, and I hope they will be ready to share the experience of working on these experiments with me.