Abstract

Quantum key distribution (QKD), in which security is ensured by physical quantum laws, is shown as the most secure communication between two distant users [1]) and finally satellite links, which allow to bridge intercontinental distances. For each of these scenarios, different types of hardware are involved and state encoding (polarization-, time- [3]) is tailored to mitigate link impairments. Additionally, the effort towards higher QKD rates is given [1-3] that future global quantum communication networks support a wider range of use cases.

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