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Robust Multi-Partite Multi-Level Quantum Protocols

Hideomi Nihira·C. R. Stroud Jr
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Abstract

We present a tripartite three-level state that allows a secret sharing protocol among the three parties, or a quantum key distribution protocol between any two parties. The state used in this scheme contains entanglement even after one system is traced out. We show how to utilize this residual entanglement for quantum key distribution purposes, and propose a realization of the scheme using entanglement of orbital angular momentum states of photons.

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Hideomi Nihira, C. R. Stroud Jr. 2004-12-13. Robust Multi-Partite Multi-Level Quantum Protocols. https://doi.org/10.1103/physreva.72.022337

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