Dynamics of single-mode nonclassicalities and quantum correlations in the Jaynes-Cummings model

TL;DR

This paper investigates the dynamics of nonclassicality and quantum correlations in the Jaynes-Cummings model, revealing how nonclassicality exchanges between atom and field and how it can be quantified and depleted using beam splitters.

Contribution

It introduces a detailed analysis of nonclassicality dynamics in the Jaynes-Cummings model, highlighting the limitations of entanglement potential and proposing a layered beam splitter approach to capture residual nonclassicality.

Findings

Nonclassicality is exchanged between atom and field via correlations.

Entanglement potential does not capture all nonclassicality.

Layered beam splitters can deplete residual nonclassicality.

Abstract

Dynamics of atom-field correlations and single-mode nonclassicalities present in the resonant Jaynes-Cummings model are investigated using negativity and entanglement potential for a set of initial states. The study has revealed the interplay between three different types of nonclassicality present in the model and established that the nonclassicality is continuously exchanged between the field and atom through the atom-field correlations. Further, it is observed that the entanglement potential does not capture all the single-mode nonclassicality and there exists some residual nonclassicality in the reduced single-mode states at the output of the beam splitter which is not captured by the entanglement in which single-mode nonclassicality is quantitatively mapped in Asboth's criterion. Additional layers of beam splitters are added to deplete all the nonclassicality and to reveal that almost all the residual nonclassicality is captured with three layers of beam splitters. Further, the reduced states of the atom and field have zero (non-zero) quantum coherence in the Fock basis when the atom-field correlations are maximum if the field (or atom) has zero (non-zero) quantum coherence initially.