Papers › Aging and Reliability of Quantum Networks
Aging and Reliability of Quantum Networks
Lisa T. Weinbrenner, Lina Vandré, Tim Coopmans, Otfried Gühne
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Quantum information science may lead to technological breakthroughs in computing, cryptography and sensing. For the implementation of these tasks, however, complex devices with many components are needed and the quantum advantage may easily be spoiled by failure of few parts only. A paradigmatic example are quantum networks. There, not only noise sources like photon absorption or imperfect quantum memories lead to long waiting times and low fidelity, but also hardware components may break, leading to a dysfunctionality of the entire network. For the successful long-term deployment of quantum networks in the future, it is important to take such deterioration effects into consideration during the design phase. Using methods from reliability theory and the theory of aging we develop an analytical approach for characterizing the functionality of networks under aging and repair mechanisms, also for non-trivial topologies. Combined with numerical simulations, our results allow to optimize long-distance entanglement distribution under aging effects.
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