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In this video I describe my PhD research in quantum computing. Is entanglement really crucial to a quantum computer? The standard wisdom says yes but I wasn't so sure. Here are a few citations: 2:20 I claimed that entanglement has been shown to cause a small (polynomial time) improvement in quantum computing in a particular circumstance. That was shown in an amazing paper that used Bell inequalities to prove you the fact: https://arxiv.org/abs/1704.00690 2:45 On the role of entanglement in the quantum-computational speed up: https://arxiv.org/abs/quant-ph/0201143 Chapter 4 of my PhD covers the entanglement project. This is the most up to date source on it- we haven't uploaded the new version to the arXiv yet: https://www.repository.cam.ac.uk/handle/1810/315974