Facilitator: John Barrett

Now we know that the internal space of the standard model has a non-commutative geometry, it seems strange that the space-time itself is merely a commutative geometry. Is this just a limit of a more general description of space-time that is non-commutative?  Some questions emerge:

1. What is a good definition of Lorentzian NCG?
2. How can space-time be deformed to such NC structures?
3. Is there any evidence in physics for NC spacetime?