Comment on “Quantum Teleportation of Eight-Qubit State via Six-Qubit Cluster State”
Recently, Zhao et al. (Int. J. Theor. Phys. 57, 516–522 2018) have proposed a scheme for quantum teleportation of an eight-qubit quantum state using a six qubit cluster state. In this comment, it’s shown that the quantum resource (multi-partite entangled state used as the quantum channel) used by Zhao et al., is excessively high and the task can be performed using any two Bell states as the task can be reduced to the teleportation of an arbitrary two qubit state. Further, a trivial conceptual mistake made by Zhao et al., in the description of the quantum channel has been pointed out. It’s also mentioned that recently a trend of proposing teleportation schemes with excessively high quantum resources has been observed and the essence of this comment is applicable to all such proposals.
KeywordsQuantum teleportation Optimal quantum resource Teleportation using optimal quantum resources Uses of Bell states
AP thanks the SERB, Department of Science and Technology (DST), India, for support provided through the project No. EMR/2015/000393. AP and MS also thank K. Thapliyal for his interest in this work some useful discussions.
- 3.Zhao, N., Li, M., Chen, N., Pei, C.X.: An efficient quantum teleportation of six-qubit state via an eight-qubit cluster state. Can. J. Phys. (2017). https://doi.org/10.1139/cjp-2017-0527