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Efficient on-chip source of microwave photon pairs in superconducting circuit QED

Florian Marquardt
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Abstract

We describe a scheme for the efficient generation of microwave photon pairs by parametric downconversion in a superconducting transmission line resonator coupled to a Cooper pair box serving as an artificial atom. By properly tuning the first three levels with respect to the cavity modes, the down-conversion probability may become higher than in the most efficient schemes for optical photons. We show this by numerically simulating the dissipative quantum dynamics of the coupled cavity-box system and discuss the effects of dephasing and relaxation. The setup analyzed here might form the basis for a future on-chip source of entangled microwave photons.

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Florian Marquardt. 2006-05-09. Efficient on-chip source of microwave photon pairs in superconducting circuit QED. https://doi.org/10.1103/physrevb.76.205416

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