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In this work, the entanglement dynamics between atom-atom, atom-field andfield-field subsystems have been studied under the double Jaynes-Cummingsmodel(DJCM). Inside the cavities, different states of the radiation field suchas squeezed coherent states (SCS) and Glauber-Lachs (G-L) states have beenchosen. For the atomic states, a Bell state (pure state) and a Werner state(mixed state) have been considered. To study the entanglement dynamics for theatom-field system, Wootter's concurrence and negativity have been used. Drasticand interesting differences between the dynamics of both fields are observed.The effects of spin-spin Ising interaction between the atoms and the effects ofdetuning on entanglement are also studied. Interesting and non-intuitivephenomena are observed due to the addition of Ising interaction. The effects ofKerr-nonlinearity on entanglement have also been investigated for atoms in bothpure and mixed states.

Effects of Thermal Photons and Squeezed Photons on Entanglement Dynamics  Between Different Subsystems of Atom-Field System inside a Cavity with Atoms  in a Pure and Mixed States in the Double Jaynes-Cummings Model