Daniel Burgarth is an associate professor of mathematics at Macquarie University in Sydney, Australia, where he studies a host of interesting things including various kinds of quantum systems.  Today he joined us to discuss his 2014 Nature paper "Quantum Computing in Plato's Cave", which studied the complexity of quantum computers through a mathematically and philosophically structured lens.  This talk was a lot of fun, and the math was refreshingly easy to follow, despite the difficult topic.  The Q&A section was also quite good, although some of it was cut from the recording (hence why you should always come to events live!).