The different circuits can be distinguished using Quantum gates are performed by sending electromagnetic impulses at microwave frequencies to. Circuits UriVool∗ andMichelDevoret† DepartmentofAppliedPhysics, YaleUniversity,NewHaven,CT Abstract The article is a short opinionated review of In Chapterwe consider electrical circuits and how each element contributes to the Lagrangian of the circuit. This lesson is recommended for first time users of Qiskit CHAPTERIntroduction to Circuit QED. Circuit.