Class C Antiferromagnetic Model Of Entangled And Phase Transitions

This article study C-type antiferromagnetic model, We obtain analytical ex-pression for the concurrence about the parameters of the Hamiltonian and absoluteT of this system. If a system is entangled at thermal equilibrium, when it reachesthe critical temperature, the system will present phase transition (PT) where entan-glement can be viewed as the order parameter. By analyzing several entanglementmeasures in the two-qubit context, we see that entanglement quantifiers can indicatedifferent orders for the same PT. Following the result of investigating antiferromag-netic we find phase transition is relation with coupling constant and temperature,the temperature of the PT occurrence will increase with increasing the couplingconstant, but it does not increase infinitely. When the PT occurrence, we can see,the coupling constant J is greater and the PT phenomena will be more obvious.