Entanglement of two superconducting charge qubits with the Glauber-Lachs state

We investigate the entanglement properties of two superconducting charge qubits that share a large Josephson junction where the field is assumed to be prepared initially in a Glauber-Lachs state. We explore the increasing effect of the chaotic field due to the thermal photons on the entanglement properties of these two superconducting charge qubits. We show that the entanglement of the qubits is very sensitive to thermal photons. The chaotic effect of the field has a reducing effect on the entanglement degree of the qubits. Also, we draw a parallelism between the Glauber-Lachs state and the random telegraph noise by means of the entanglement.