Number-phase entropic squeezing and nonclassical properties of a three-level atom interacting with a two-mode field: Intensity-dependent coupling, deformed Kerr medium and detuning effects

TL;DR

This paper investigates the nonclassical properties of a three-level atom interacting with a two-mode field, focusing on number-phase entropic squeezing and the effects of nonlinearities, intensity-dependent coupling, and detuning.

Contribution

It extends previous models by analyzing how nonlinearities and parameter choices influence nonclassical phenomena in a three-level atom-field system.

Findings

Number-phase entropic squeezing is achievable with parameter tuning.

Nonclassical features like sub-Poissonian statistics and squeezing are enhanced by nonlinearities.

Detuning and intensity-dependent coupling significantly affect nonclassicality domains.

Abstract

In this paper, we follow our presented model in J. Opt. Soc. Am. B {\bf 30}, 1109--1117 (2013), in which the interaction between a $\Lambda$-type three-level atom and a quantized two-mode radiation field in a cavity in the presence of nonlinearities is studied. After giving a brief review on the procedure of obtaining the state vector of the atom-field system, some further interesting and important physical features (which are of particular interest in the quantum optics field of research) of the whole system state, i.e., the number-phase entropic uncertainty relation (based on the two-mode Pegg-Barnett formalism) and some of the nonclassicality signs consist of sub-Poissonian statistics, Cauchy-Schwartz inequality and two kinds of squeezing phenomenon are investigated. During our presentation, the effects of intensity-dependent coupling, deformed Kerr medium and the detuning parameters on the depth and domain of each of the mentioned nonclassical criteria of the considered quantum system are studied, in detail. It is shown that each of the mentioned nonclassicality aspects can be obtained by appropriately choosing the related parameters.