Non-locality and causality in quantum mechanics, along with quantum simulators, are currently some of the most actively researched topics in physics. These can all be categorized under the broader umbrella of complex quantum networks. In practical terms, these networks often comprise unreliable components, which lack full quantum control and are subject to noise. The goal of this project is to establish a unified formalism for unreliable quantum networks, positioning them as a resource for information processing. Within this framework, our efforts will concentrate on three specific areas: i) Advanced forms of quantum non-locality, which surpass the conventional form outlined in Bell’s theorem, ii) Quantum superpositions of causal orders, serving as an operational resource for quantum information, and iii) Certification of unreliable many-body quantum simulators. While the project is primarily theoretical, it holds relevance for experimental applications. It aims to push the boundaries of theoretical physics, leveraging the most cutting-edge quantum technologies.