Sat-DQC: A feasibility study of distributed quantum computing enabled by satellite communication

Kurzfassung

The objective of Sat-DQC is to analyze and identify potential use cases for distributed quantum computing (DQC) assisted by satellite-mediated quantum communication links. In our talk, we present our approach to analyze these scenarios: On the one hand we investigate entanglement distribution via satellites, considering, e.g., different orbits and entanglement distribution schemes. On the other hand we analyze and assess DQC applications that are suitable to be executed under the restrictions of the satellite channel, e.g. regarding entanglement distribution rate or limited connection times. One possible DQC scenario to be analyzed is connecting quantum computing clusters in different geographical locations to enable quantum computations that do not fit in any of the individual clusters. Due to the constraints on entanglement distribution via satellites, the class of DQC algorithms that can be implemented will be limited to those that generate only a small, but non-negligible, amount of entanglement across QPUs. A secondary scenario to be investigated is blind quantum computing, where a client of limited quantum resources requires to perform a calculation on a remote quantum server, without revealing any information about the computation. This scenario requires quantum communication between the two parties and, since the parties may be located far apart from each other, satellite links should be preferred.