Nonclassical properties of a state generated by a driven dispersive interaction

TL;DR

This paper explores the nonclassical properties of a cavity field state generated through a driven dispersive atom-cavity interaction, analyzing its statistical features like photon distribution, Wigner function, and squeezing.

Contribution

It introduces a method to generate and analyze nonclassical cavity states influenced by a driven dispersive interaction, highlighting new quantum statistical properties.

Findings

Photon number distribution exhibits nonclassical features.

Wigner function reveals negative regions indicating nonclassicality.

Squeezing and Mandel's Q parameter show quantum statistical behavior.

Abstract

We consider a cavity field state, which is created by the atom-cavity field's interaction in the presence of a driven field. The two-level atom passes through the cavity and is driven by a weak classical field. A photon number dependent Stark shift is induced by the atom's dispersive interaction with the cavity field. When the atom is in excited state $|a\rangle$, the output cavity field thus obtained is taken into consideration. With the help of the state evaluated, we investigate different statistical properties such as photon number distribution, Wigner function, Mandel's $Q$ parameter and squeezing.