ar X iv : 1 10 6 . 25 70 v 1 [ qu an t - ph ] 1 3 Ju n 20 11 Entanglement generation and transfer between remote atomic qubits interacting with squeezed field Paulo

A pair of two level atoms A1A2, prepared either in a separable state or in an entangled state interacts with a single mode of two mode squeezed cavity field while a third atomic qubit B interacts with the second mode of the field in a remote cavity. We analyze, numerically, the dependence of three qubit entanglement generation, sudden death and revival on the degree of squeezing of electromagnetic field and initial entanglement of qubits A1 and A2. Global negativity of partially transposed state operator is used to quantify the entanglement of three atom state. The squeeze parameter value of s = 0.64 and initial state with a Bell pair in first cavity generates a three qubit mixed state with qubit in second cavity highly entangled to the Bell pair. However, a smaller value s = 0.4 under similar conditions generates a three qubit mixed state with comparable entanglement but lesser noise.