Two-photon detuning and decoherence in cavity electromagnetically induced transparency for quantized fields

TL;DR

This paper investigates how two-photon detuning and atomic decoherence affect the quantum noise properties of a cavity EIT system with quantized fields, revealing high sensitivity of the output field to detuning.

Contribution

It provides a detailed analysis of the impact of two-photon detuning and decoherence on the quadrature noise spectrum in cavity EIT with quantized fields, including the effects of atomic decoherence.

Findings

Output field is highly sensitive to two-photon detuning.

Atomic decoherence influences the noise spectrum of the output.

The mean field remains unaffected despite EIT conditions.

Abstract

The interaction of a quantized field with three-level atoms in $\Lambda$ configuration inside a two-mode cavity is analyzed in the small noise approximation. The atoms are in a two-photon detuning with respect to the carriers of the field. We calculate the stationary quadrature noise spectrum of the field outside the cavity in the case where the input probe field is a squeezed state and the input pump field is a coherent state. The mean value of the field is unaltered in all the analysis: the atoms shows electromagnetically induced transparency (EIT). The effect of the atoms' base level decoherence in the cavity output field is also studied. It is found that the output field is very sensitive to two-photon detuning.