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We investigate the effects of three-site interactions on the pairwise entanglement in a three-qubit Heisenberg XX model. We find the three-site interactions only in favor of the thermal entanglement and benefit the teleportation between the next-to-nearest neighbor qubits. In addition, we also study the stationary entangled state in the model with intrinsic decoherence taken into account. The influence...
The effects of Kerr-like medium and intensity-depend coupling on entropy exchange and entanglement in Jaynes-Cummings model are investigated. Our results show that introducing the Kerr-like medium and intensity-depend is very helpful for improving the quality of entropy exchange. In addition, by the concept of the lower bound of the concurrence, the entanglement between the atom and the field under...
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