Robust Multi-Partite Multi-Level Quantum Protocols

Details Robust Multi-Partite Multi-Level Quantum Protocols Robust Multi-Partite Multi-Level Quantum Protocols

2004-12-13

arxiv.org/abs/quant-ph/0412097v1

Physics

Quantum Physics

9 pages, 2 figures

Scientific paper

10.1103/PhysRevA.72.022337

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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