NanoLund Quantum seminar

Our speakers are Erik Lundblad and Mira Abu Yahia from the division of Atomic Physics, who will be presenting on the topic of:

Transport-based Quantum Repeater Scheme for Global Distribution of Entanglement

Abstract:

Rare-earth ions are considered strong candidates for quantum repeaters, which are essential components in achieving distributed quantum computing and a global quantum cryptography network. However, realizing such a network in practice remains a challenge due to the large number of repeater nodes required for long-distance communication, particularly in fiber-based schemes. Here, we propose a scheme for entanglement distribution based on the physical transportation of qubits in a satellite. We show that it is possible to create a link of entangled EPR pairs between the satellite and a ground station using heralded entanglement generation. With the satellite traveling to a new destination, a second link can be generated at a new ground station, allowing us to establish a link between the ground stations themselves using deterministic entanglement swapping. The possible rate of distributing entanglement is discussed, taking realistic losses of free-space communication into account.