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