Objectively discerning Autler-Townes Splitting from Electromagnetically Induced Transparency

Abstract

Autler-Townes splitting (ATS) and electromagnetically-induced transparency (EIT) both yield transparency in an absorption profile, but only EIT yields strong transparency for a weak pump field due to Fano interference. Empirically discriminating EIT from ATS is important but so far has been subjective. We introduce an objective method, based on Akaike's information criterion, to test ATS vs. EIT from experimental data and determine which pertains. We apply our method to a recently reported induced-transparency experiment in superconducting circuit quantum electrodynamics.

Extended discussion of ATS vs. EIT testing in realistic systems is given. Two figures were combined and one new was added

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