The presence of interaction, at least initially, destroys localization in a cloud of quantum particles, and allows the cloud to escape and smear out, though very slowly and subdiffusively.
I swear This happened to me Thursday Exactly this way Spooky
Copyright@2019 Dennis Willis
1. https://phys.org/news/2019-02-breaching-horizons-universal-laws.amp About a third of the way in the article.
Then I found this doozy. Honest. I cannot grasp writing the following sentence without serious intoxicants.
The laws that explain how pizza gets uniformly cooked in an oven are not valid for systems of atoms at ultracold temperatures. A team of researchers at the Center for Theoretical Physics of Complex Systems, within the Institute for Basic Science (IBS, South Korea) has designed an innovative method to study how interacting particles behave at temperatures close to absolute zero, and found a situation where the laws of thermodynamics and statistical mechanics are not respected, energy is not evenly distributed, and equilibrium is not reached. Their findings are published in Physical Review Letters.