Abstract
We consider quantum teleportation as a tool to investigate the thermally entangled state of a three-qubit Heisenberg $\mathrm{XX}$ ring. Our investigation reveals interesting aspects of quantum entanglement not reflected by the pairwise thermal concurrence of the state. In particular, two mixtures of different pairs of W states, which result in the same concurrence, could yield very different average teleportation fidelities.
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