Effects of decoherence on the radiative and squeezing properties in a coherently driven trapped two-level atom

TL;DR

This paper investigates how decoherence impacts the radiative and squeezing properties of a coherently driven trapped two-level atom, revealing that quantum features persist despite decoherence effects.

Contribution

It provides a detailed analysis of decoherence effects on atomic emission spectra, squeezing, and photon statistics in a driven two-level atom system.

Findings

Decoherence broadens emission spectrum lines and reduces their height.

The atom remains mostly in the lower energy level at steady state.

Quantum features like photon anti-bunching and squeezing persist despite decoherence.

Abstract

Analysis of the effects of decoherence on the radiative and squeezing properties of a coherently driven two-level atom trapped in a resonant cavity applying the corresponding master equation is presented. The atomic dynamics as well as the squeezing and statistical properties of the emitted radiation are investigated. It is found that the atom stays in the lower energy level more often at steady state irrespective of the strength of the coherent radiation and thermal fluctuations entering the cavity. Moreover, a strong external coherent radiation results the splitting of the line of the emission spectrum, whereas the decoherence broadens the width and significantly decreases the height. It is also found that the emitted radiation exhibits photon anti-bunching, super-Poissonian photon statistics and squeezing, despite the presence of the decoherence which is expected to destroy the quantum features.