>I would have thought that it’s almost impossible for a particle to end up in the same place as it started. That's true on a short time scale. But on a longer

>I would have thought that it’s almost impossible for a particle to end up in the same place as it started. That's true on a short time scale. But on a longer time scale, you will eventually visit all possible states of the system. I think this is similar to the concept of ergodicity[0]. [0]: https://en.wikipedia.org/wiki/Ergodicity https://en.wikipedia.org/wiki/Ergodicity