This is a post of the Time in Physics (TiP) series. Quantum mechanics is our best theory of the microscopic world. However, time in quantum mechanics is treated as a mysterious external parameter. We make it a “real” thing by defining a clock. However, we will see that the clock itself violates the rules of quantum mechanics!
This is a post of the Time in Physics (TiP) series. To (also) describe microscopic objects, the theory of quantum mechanics was developed as replacement for classical mechanics. In this post, we explore the weirdness of quantum mechanics by showing that three spatial dimensions are not enough for it to work.
This is a post of the Time in Physics (TiP) series. Time can be viewed as correlation of motions inside a physical system. With the help of a runner, a clock, and balls on a billiard table we can replace the problematic concept of Newtonian time with something that can exists not only in the world of large objects, but also in the weird quantum world of tiny particles.
This is a post of the Time in Physics (TiP) series. We discuss Newtonian time, which is a time based on non-relativistic macroscopic objects but which also appears in the theory of the microscopic world. With the help of balls on a billiard table we explore its intuitive meaning and get an idea of the shortcomings of the concept.