Qiaolun Zhang - Resource Allocation for QKD and Quantum Networks

Resource Allocation for QKD and Quantum Networks

This seminar, given by Qiaolun Zhang, will happend on 22 May 2024, at 9:0. It will take place in Room Not specified.

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Abstract

The rapid development of quantum computing technologies is threatening traditional cryptography, making data exchange over communication networks with traditional cryptosystems no longer secure against the attack of a large-scale quantum computer. To protect the networks against quantum threats, quantum technologies are being investigated and tested as a safe countermeasure to provide information-theoretic security for communication networks. However, in QKD networks, the key rate achievable over a weak quantum signal is limited by the link performance (e.g., loss and noise) and propagation distance, especially in multi-node QKD networks, making it necessary to design a scheme to efficiently and timely distribute keys to the various nodes. Hence, I investigated the resource allocation algorithms for current quantum key distribution (QKD) networks and future quantum networks. My talk is divided into two main parts: firstly, resource allocation for QKD networks, where I will discuss the trade-offs between trusted relay and optical bypass technologies to enhance the resource efficiency of QKD network; and secondly, resource allocation for quantum networks, particularly entanglement routing, focusing on optimizing device placement for deployment of quantum networks. I will conclude with an overview of ongoing activities in satellite QKD networks.