Identical particles: from one to many

First lecture in the "More is different" - how states of matter emerge from quantum theory Saturday morning of Theoretical Physics. With Professor John Chalker, introduction by Professor John Wheeler. John Chalker will review the quantum mechanics of identical particles which forms the foundation for our understanding of why diamond is transparent and why gold conducts electricity. He will also explain how we can control the motion of electrons in certain devices to make resistances quantised with an accuracy of a few parts in a billion. More on this mini-series; The properties of all forms of matter, from the most mundane to the most exotic kinds produced in advanced laboratories, are consequences of the laws of quantum mechanics. Understanding how macroscopic behaviour emerges from microscopic laws in a system of many particles is one of the intellectually most demanding, yet most important, challenges of physics, and is the subject of this series of lectures.