Comment on "Multi-output quantum teleportation of different quantum information with an IBM quantum experience"

TL;DR

This paper critiques a previous multi-output quantum teleportation scheme, demonstrating it used excessive resources and proposing a more resource-efficient alternative implemented on IBM quantum computers.

Contribution

It shows that the original scheme used unnecessarily high quantum resources and introduces a more optimal method for multi-output teleportation.

Findings

Original scheme used extensive quantum resources.

Proposed scheme achieves the same task with fewer resources.

Experimental results support the resource efficiency of the new scheme.

Abstract

Recently, Yu et al., (Commun. Theor. Phys. 73 (2021) 085103) has proposed a scheme for "multi-output quantum teleportation" and has implemented the scheme using an IBM quantum computer. In their so called multicast-based quantum teleportation scheme, a sender (Alice) teleported two different quantum states (one of which is a m-qubit GHZ class state and the other is a (m+1)-qubit GHZ class state) to the two receivers. To perform the task, a five-qubit cluster state was used as a quantum channel, and the scheme was realized using IBM quantum computer for m = 1. In this comment, it is shown that the quantum resources used by Yu et al., was extensively high. One can perform the same task of two-party quantum teleportation using two Bell states only. The modified scheme for multi-output teleportation using optimal resources has also been implemented using IBM quantum computer for m = 1 and the obtained result is compared with the result of Yu et al.