Quantum non-linear dynamics of photons and Cooper-pairs in a superconducting circuit

Orateur : Andrew ARMOUR (University of Nottingham)

Embedding a Josephson junction within a superconducting microwave cavity provides a novel way of exploring strongly non-linear quantum dynamics. Energy from a flow of Cooper pairs through the Josephson junction (driven by an applied voltage) pumps the cavity generating a population of photons which in turn strongly affect the charge dynamics. This results in interesting non-equilibrium steady-states in the cavity which can have a range of non-classical properties. In this talk I will outline a simple theoretical model inspired by recent experimental work on Josephson junction-cavity systems and describe aspects of the dynamics of the cavity photons and Cooper pairs.

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