Concurrent multipath quantum entanglement routing based on segment routing in quantum hybrid networks

Abstract

In the future, quantum networks will be an important development direction. Quantum networks should be studied considering quantum's unique physical properties. In quantum networks with limited resources, decoherence will lead to qubits loss, which restricts the time that data qubits can be stored in memory before use. To realize the network function, it is very important to transmit data qubits as quickly as possible. In order to ensure timeliness and make use of entanglement resources as much as possible, this paper proposes a concurrent multipath entanglement routing scheme based on segment routing for quantum hybrid networks. In this scheme, centralized routing is used to calculate the “segments” of quantum relay path, and distributed routing is used to transmit control messages between the “segments”. The “concurrent” mechanism is fully adopted in classical messages passing, path nodes BSM (Bell State Measurement) execution and multipath shunt transmission. This scheme has obvious advantages in multipath concurrent transmission, traffic diversion, reducing transmission time and providing redundancy.