Vacuum Induced Transparency and Photon Number Resolved Autler-Townes Splitting in a Three-level System

Overview

Journal Sci Rep

Specialty Science

Date 2018 Mar 16

PMID 29540786

Authors

Jiang-Hao Ding

Sai-Nan Huai

Hou Ian

Yu-Xi Liu

Affiliations

Soon will be listed here.

Abstract

We study the absorption spectrum of a probe field by a Λ-type three-level system, which is coupled to a quantized control field through the two upper energy levels. The probe field is applied to the ground and the second excited states. When the quantized control field is in vacuum, we derive a threshold condition to discern vacuum induced transparency (VIT) and vacuum induced Autler-Townes splitting (ATS). We also find that the parameter changing from VIT to vacuum induced ATS is very similar to that from broken PT symmetry to PT symmetry. Moreover, we find the photon number resolved spectrum in the parameter regime of vacuum induced ATS when the mean photon number of the quantized control field is changed from zero (vacuum) to a finite number. However, there is no photon number resolved spectrum in the parameter regime of VIT even that the quantized control field contains the finite number of photons. Finally, we further discuss possible experimental realization.

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