Laser Physics Letters

Intensity–intensity and intensity–amplitude correlation of microwave photons from a superconducting artificial atom

Fei Wang, Xun‐Li Feng, C. H. Oh

Published Aug 26, 2016• 4 citations

Abstract

Abstract We investigate the dynamics of the microwave-frequency nonclassical correlations in a three-level Δ -configuration artificial atom, which is realized by superconducting quantum circuits. The intensity–intensity correlation and intensity field are strongly dependent on the relative phase Φ of the driven fields. It is found that two interference loops are formed in the dressed state picture at Φ = 0 or π , which are responsible for the generation of nonclassical microwave photons. When the phase is changed into Φ = π / 2 or 3 π / 2 , the temporal correlation functions exhibit different oscillating behaviors. The phase-sensitive nonclassical correlations of fluorescence photons may find practical application in the design of all-optical switches and quantum information processing.

DOI: 10.1088/1612-2011/13/10/105201

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