Live Blogging: Shumelda

Questions:

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.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s