The most powerful formula in physics starts with a slender S, the symbol for a sort of sum known as an integral. Further along comes a second S, representing a quantity known as action. Together, ...

Recently I published my first biographical book, Quantum Man: Richard Feynman’s Life in Science. This was a departure for me—I usually write about science, not the people who do science. But I ...

How do you calculate infinite quantum outcomes? Feynman Diagrams. The equations of quantum field theory allow us to calculate the behaviour of subatomic particles by expressing them as vibrations in ...

I have been listening to Richard Feynman and his classic series of physics lectures. It’s not exactly light reading or whatever the audiobook equivalent is of light reading, but it’s also amazingly ...

At the Large Hadron Collider in Geneva, physicists shoot protons around a 17-mile track and smash them together at nearly the speed of light. It’s one of the most finely tuned scientific experiments ...

Mark Barrett correctly points out that in Richard Feynman's path-integral formulation of quantum mechanics, a particle is in a sense everywhere at once (Letters, 13 October). On the same page, Koos ...