Standard Teleportation of One-Qubit State and Partial Teleportation of Two-Qubit State via X-States

In this article, we derive the explicit entanglement and fidelity expressions for a larger class of two-qubit states, namely, a seven-parameter family of so ca^led X-states. The ana/ytical expressions of the entanglement, the output entanglement and the average fidelity are obtained for this genera/model by using the concept of concurrence and average fidelity. We study the relations between quantum entanglement, the output entanglement, and the average fidelity for standard teleportation of one-qubit and partial teleportation of two-qubit state. We discover that the average fidelity and entanglement is not a simple dependence relation. The higher entangled system is helpful for teleportation.