Are there any physical systems that violate Lorentz invariance?
When I asked this question from an AI bot I got the following reply:
"Yes, there are physical systems in which Lorentz invariance is violated. These include condensed matter systems with background fields, such as those of superconductors and superfluids, and systems involving extra spatial dimensions."
But the Wikipedia article on Modern searches for Lorentz violation (https://en.wikipedia.org/wiki/Modern_searches_for_Lorentz_violation) says "No Lorentz violations have been measured thus far, and exceptions in which positiv…