Entanglement of three-qubit pure states in terms of teleportation capability

Abstract

We define an entanglement measure, called the partial tangle, which represents the residual two-qubit entanglement of a three-qubit pure state. By its explicit calculations for three-qubit pure states, we show that the partial tangle is closely related to the faithfulness of a teleportation scheme over a three-qubit pure state.

4 pages, 1 figure, accepted for publication as a Brief Report in Physical Review A