Introduction to parametric amplification of quantum signals with Josephson circuits

Publication date: Available online 10 August 2016 Source:Comptes Rendus Physique Author(s): Ananda Roy, Michel Devoret This short and opinionated review starts with the concept of quantum signals at microwave frequencies and focuses on the principle of linear parametric amplification. This process emerges from the dispersive nonlinearity of Josephson junctions driven with appropriate tones. We discuss two defining characteristics of the corresponding amplifying devices: i) the number of modes excited by the signal, idler and pump waves and ii) the number of independent ports through which these waves enter into the circuit.

Source: Comptes Rendus Physique - August 10, 2016 Category: Physics Source Type: research