Journal
PHYSICAL REVIEW A
Volume 97, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.97.032312
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Funding
- Austrian Science Fund (FWF) through START Project [Y879-N27]
- joint Czech-Austrian project MultiQUEST (FWF) [I 3053-N27]
- joint Czech-Austrian project MultiQUEST (GACR) [GF17-33780L]
- SAIA n.o.
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We introduce a family of quantum key distribution protocols for distributing shared random keys within a network of n users. The advantage of these protocols is that any possible key structure needed within the network, including broadcast keys shared among subsets of users, can be implemented by using a particular multipartite high-dimensionally entangled quantum state. This approach is more efficient in the number of quantum channel uses than conventional quantum key distribution using bipartite links. Additionally, multipartite high-dimensional quantum states are becoming readily available in quantum photonic labs, making the proposed protocols implementable using current technology.
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