There is a nice Q&A to this talk.
The Royal Institution of Great Britain (often abbreviated as the Royal Institution or Ri) is an organisation devoted to scientific education and research, based in London.
Definition from Wikipedia – Royal Institution
David Tong (physicist)
David Tong is a professor of theoretical physics at DAMTP in Cambridge, a fellow of Trinity College, Cambridge, and joint recipient of the 2008 Adams Prize.
Definition from Wikipedia – David Tong (physicist)
Quantum field theory
In theoretical physics, quantum field theory (QFT) is a theoretical framework that combines classical field theory, special relativity, and quantum mechanics and is used to construct physical models of subatomic particles (in particle physics) and quasiparticles (in condensed matter physics).
Definition from Wikipedia – Quantum field theory