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Comment on “Quantum Controlled Teleportation of Bell State Using Seven-Qubit Entangled State”

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Abstract

Recently, Chen et al. [Int. J. Theor. Phys. 59, 1402–1412 (2020)] proposed a theoretical scheme for controlled quantum teleportation (CQT) of a Bell state by using seven-qubit entangled state as a quantum channel. In this comment, it is shown that the consumption of both the quantum and classical resources used by Chen et al. is excessively high because the actual task of CQT of a Bell state via seven-qubit entangled state can be reduced to the CQT of an arbitrary single-qubit state via three-qubit GHZ state. Hence, in this work, an improved scheme for CQT has been presented. We have also shown that the CQT of certain class of N-qubit entangled state can also be realized successfully by using a three-qubit GHZ state as the quantum channel. The intrinsic efficiency of the present communication scheme is very large as compared to that proposed by Chen et al.

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Acknowledgments

The authors are thankful to Dr. Rakesh Kumar and Dr. Archana Verma for their kind help, valuable comments and useful suggestions.

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Authors and Affiliations

  1. Department of Physics, Deshbandhu College, University of Delhi, New Delhi-110019, India

    Vikram Verma

  2. Department of Physics, CMP Degree College, University of Allahabad, Prayagraj-211002, India

    Ajay K. Yadav

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  1. Vikram Verma
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  2. Ajay K. Yadav
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Correspondence to Ajay K. Yadav.

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Verma, V., Yadav, A.K. Comment on “Quantum Controlled Teleportation of Bell State Using Seven-Qubit Entangled State”. Int J Theor Phys 60, 348–354 (2021). https://doi.org/10.1007/s10773-020-04697-6

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  • DOI: https://doi.org/10.1007/s10773-020-04697-6

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