Live Blogging: Shumelda


Dietrich: Not sure she agrees that in LQG spin networks and spin foams are BI in the relevant sense. There are questions about how we get emergent manifolds just as in Quantum graphity, so can we really divide the two approaches. 

Oriti: geometrogenesis doesn’t itself mark out particular theories – he mentioned it in the context of LQG. One of the important distinctions is that in some models (quantum graphity?) we have introduction of a time variable and hence perhaps less background independence. 

Mark: understood Q. graphity as not having a single notion of time not sum over histories.

Oriti: we can understand it as a sum over histories but there’s still externally introduced time.


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