Entanglement Transfer via Heisenberg Interaction in a Four-Qubit System

摘要

We investigate the entanglement transfer in a four-qubit system and calculate the concurrence betweenany two qubits in different initial states.We show that both the pure entangled state and mixed entangled state can betransferred.For some special coupling constants and some evolution time,entanglement can be completely transferredfrom one pair particles to another.