Abstract
Recently, Aliloute et al. [Quantum Inf Process 20, 29 (2021)] proposed a scheme of bidirectional quantum teleportation of coherent state qubit using three-mode entangled coherent state as a resource with success probability 1/2. However, their scheme is not feasible due to some shortcomings. In this present work, we propose a scheme of bidirectional quantum teleportation of coherent state qubit between two distant partners Alice and Bob, with the consent of controller, Charlie. We use five-mode cluster-type entangled coherent state as the quantum resource to achieve this task. The scheme uses linear optical devices such as beam splitters, phase shifters, and photon counters. It is shown that for moderately large coherent amplitude, near perfect controlled bidirectional quantum teleportation can be obtained in terms of the average fidelity of teleportation.
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Acknowledgements
RKP dedicate this paper in the memory of Prof. Ranjana Prakash and Prof. Hari Prakash. May their soul rest in peace. RKP is thankful to UGC for providing financial assistance under CSIR-UGC SRF fellowship. Discussions with Dr. M K Mishra, Dr. O N Verma, Dr. V Verma and Ms. S Javed are gratefully acknowledged.
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Pandey, R.K., Yadav, P.S., Prakash, R. et al. Controlled Bidirectional Quantum Teleportation of Superposed Coherent State Using Five-mode Cluster-type Entangled Coherent State as a Resource. Int J Theor Phys 61, 104 (2022). https://doi.org/10.1007/s10773-022-05080-3
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DOI: https://doi.org/10.1007/s10773-022-05080-3