Unity fidelity multiple teleportation using partially entangled states

TL;DR

This paper demonstrates the generality of the multiple teleportation protocol (MTP), introduces two more efficient MTPs requiring fewer teleportations, and shows that less entanglement can lead to higher success probabilities.

Contribution

It generalizes the MTP beyond the KLM scheme and presents two new protocols that improve efficiency and success probability with less entanglement.

Findings

New MTPs require half the teleportations of the original.

One protocol achieves higher success with less entanglement.

MTP is applicable beyond the KLM scheme.

Abstract

We show that the recent multiple teleportation protocol (MTP) presented in Ref. [Phys. Rev. Lett. 100, 110503 (2008)] is not restricted to the Knill-Laflamme-Milburn (KLM) scheme. Rather, we show that MTP is quite general and can be implemented using whatever teleportation scheme at hand. We also present two new MTP's which are more efficient than the original proposal, requiring just half the number of teleportations of the original scheme to achieve at least the same probability of success. One of the protocols, however, employs less entanglement than all the previous ones yielding, surprisingly, the greatest probability of success.