Abstract
Entangled states can be used as secure carriers of information much in the same way as carriers are used in classical communications. In such protocols, quantum states are uploaded to the carrier at one end and are downloaded from it in safe form at the other end, leaving the carrier intact and ready for reuse. Furthermore, protocols have been designed for performing quantum state sharing in this way. In this work, we study the robustness of these protocols against two of the most common sources of noise, namely de-phasing and depolarization and show that multiple uses of these carriers do not lead to accumulative errors, rather the error remains constant and under control.
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Acknowledgements
This research was partially supported by a Grant No. 96011347 from the Iran National Science Foundation. The work of V. K. was also partially supported by the Grant G950222 from the research grant system of Sharif Univeristy of Technology. We also thank Abdus Salam ICTP where the final stages of this work was completed.
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Emamipanah, S., Asoudeh, M. & Karimipour, V. Entangled states as robust and re-usable carriers of information. Quantum Inf Process 19, 357 (2020). https://doi.org/10.1007/s11128-020-02822-2
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DOI: https://doi.org/10.1007/s11128-020-02822-2