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Giant Cross-Kerr Effect for Propagating Microwaves Induced by an Artificial Atom

Overview
Journal Phys Rev Lett
Specialty Biophysics
Date 2013 Aug 20
PMID 23952397
Citations 20
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Abstract

We investigate the effective interaction between two microwave fields, mediated by a transmon-type superconducting artificial atom which is strongly coupled to a coplanar transmission line. The interaction between the fields and atom produces an effective cross-Kerr coupling. We demonstrate average cross-Kerr phase shifts of up to 20 degrees per photon with both coherent microwave fields at the single-photon level. Our results provide an important step toward quantum applications with propagating microwave photons.

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