Quantum computing

In computer science, the notion of " bit ", an elementary unit of information, is often discussed in mathematical terms, for example when discussing Boolean operations or the capacity of a transmission channel. This is justified by the universality of most computing algorithms and communication protocols, which are largely independent of the concrete details of physical signal implementation. However, when we turn our attention to the ultimate limits of information processing, and in particular to those of its characteristics such as throughput, data volume, energy consumption, latency, etc., the physical nature of the information-carrying degrees of freedom and their mutual interactions become crucial. In the Mesoscopic Physics lectures, we explore the physics of electronic devices and circuits that process information at the most elementary level : one and zero are represented by the presence and absence of an excitation quantum of the circuit's electromagnetic fields. This year's lessons covered the fundamentals of quantum computation and the coordinated manipulation of bits in a quantum register.