Quantum teleportation of composite systems via mixed entangled states
نویسندگان
چکیده
We analyze quantum teleportation for composite systems, specifically for concatenated teleporation decomposing a large composite state into smaller states of dimension commensurate with the channel and partial teleportation teleporting one component of a larger quantum state . We obtain an exact expression for teleportation fidelity that depends solely on the dimension and singlet fraction for the entanglement channel and entanglement measures by I concurrence for the state; in fact quantum teleportation for composite systems provides an operational interpretation for I concurrence. In addition we obtain tight bounds on teleportation fidelity and prove that the average fidelity approaches the lower bound of teleportation fidelity in the highdimension limit.
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