321 | David Tong on Open Questions in Quantum Field Theory

<p>Quantum field theory is the basis for our most successful theories of fundamental physics. And yet, there are things we don't understand about it. Some of these puzzles are relatively well-known, while others are less celebrated. David Tong joins us to talk about some of the more interesting and perplexing aspects of quantum field theory. He also discusses his new project to write a series of textbooks covering (all?) important topics in theoretical physics. To date, these include&nbsp;<a href="http://www.damtp.cam.ac.uk/user/tong/books/classical.html" rel="noopener noreferrer" target="_blank"><em>Classical Mechanics</em></a>,&nbsp;<a href="http://www.damtp.cam.ac.uk/user/tong/books/quantum.html" rel="noopener noreferrer" target="_blank"><em>Quantum Mechanics</em></a>,&nbsp;<a href="http://www.damtp.cam.ac.uk/user/tong/books/fluids.html" rel="noopener noreferrer" target="_blank"><em>Fluid Mechanics</em></a>, and&nbsp;<a href="http://www.damtp.cam.ac.uk/user/tong/books/electro.html" ...