  In this work, 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 both squeezed photons and thermal photons on entanglement dynamics is
observed. The main feature of the double Jaynes-Cummings model - entanglement
sudden death is observed 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.
