Entanglement dynamics in intensity-dependent double Jaynes-Cummings model for squeezed coherent thermal states

TL;DR

This paper investigates how entanglement evolves among subsystems in the intensity-dependent double Jaynes-Cummings model with squeezed coherent thermal states, highlighting the roles of various interactions and parameters in controlling entanglement behavior.

Contribution

It introduces a detailed analysis of entanglement dynamics in the IDDJCM and DJCM, considering multiple interactions and states, and shows how to prevent entanglement sudden death through parameter tuning.

Findings

Entanglement sudden death occurs in all subsystems.

Proper interaction parameters can eliminate entanglement death.

Squeezed and thermal photons have complementary effects on entanglement.

Abstract

In this paper, the entanglement dynamics of different subsystems such as atom-atom, atom-field and field-field with radiation field in squeezed coherent thermal states for the intensity-dependent double Jaynes-Cummings model (IDDJCM) and double Jaynes-Cummings model (DJCM) are investigated. The effects of squeezed and thermal photons on entanglement are examined, revealing their complementary roles in shaping the entanglement behavior in both models. One of the main features of the double Jaynes-Cummings model is the observation of entanglement sudden death for every subsystem. The effects of various interactions such as Ising interaction, single photon exchange interaction and dipole-dipole interaction on entanglement dynamics are studied. The effects of detuning, Kerr-nonlinearity on the entanglement dynamics are investigated for every subsystem. It is noticed that proper choice of the interactions parameters, detuning and Kerr-nonlinearity effectively removes entanglement deaths from the dynamics.