Lorentz invariance in loop quantum gravity
In relativistic physics, Lorentz invariance states that the laws of physics should remain unchanged under Lorentz transformation. In quantum gravity, Lorentz invariance measures the universal features in the hypothetical loop quantum gravity universes; which is a hypothetical theory that explains the quantum theory of gravity based on a geometrical interpretation of the theory of relativity.
Source: Wikipedia — Lorentz invariance in loop quantum gravity (CC BY-SA 4.0)