Asymptotic teleportation scheme as a universal programmable quantum processor

TL;DR

The paper presents an asymptotic quantum teleportation scheme using multiple entangled pairs, achieving near-perfect fidelity for large N, and functions as a universal programmable quantum processor.

Contribution

It introduces a protocol employing N entangled pairs and the square-root measurement to realize asymptotic teleportation with universal processing capabilities.

Findings

Perfect teleportation fidelity asymptotically achieved as N increases

Optimal measurement is the square-root measurement

Scheme functions as a universal programmable quantum processor

Abstract

We consider a scheme of quantum teleportation where a receiver has multiple (N) output ports and obtains the teleported state by merely selecting one of the N ports according to the outcome of the sender's measurement. We demonstrate that such teleportation is possible by showing an explicit protocol where N pairs of maximally entangled qubits are employed. The optimal measurement performed by a sender is the square-root measurement, and a perfect teleportation fidelity is asymptotically achieved for a large N limit. Such asymptotic teleportation can be utilized as a universal programmable processor.