Watch a conference talk from TQC 2023 exploring the relationship between contextuality and entanglement in composite quantum systems. Delve into how quantum theory fundamentally differs from classical physics through the lens of the Kochen-Specker theorem and its applications in quantum computation. Learn about recent research findings on nonclassicality in single and multi-party quantum systems, with particular focus on restricted models of multiqubit quantum computation with state injection. Based on published work in Quantum journal, the presentation examines how entanglement, traditionally requiring multiple parties, interacts with contextuality, which can manifest in single systems. Understand the theoretical foundations that drive quantum information applications and computation, presented at the 18th Conference on Theory of Quantum Computation, Communication and Cryptography at the University of Aveiro.