SkySwapping: Entanglement resupply by separating quantum swapping and photon exchange

We propose a fast, satellite-based, on-demand entanglement resupply protocol which leverages entangled pairs exchanged in advance between satellites and ground stations. At the request time, the protocol does not require any quantum information exchange between ground and satellite, by performing the quantum entanglement swapping on satellite-level only, thus separating the particle exchange phase. In this work we analyzed different recent approaches on the topic of satellite-based entanglement resupply and our protocol improves existing works by minimizing fidelity loss due to environmental factors regardless of the distance between requesting ground stations.