Panel Discussion on: Recovering Low Energy Physics

Continuation of the discussion on semi-classical issues from two weeks ago following John Barret's talk. Main Issue that came up two weeks ago: • In semi-classical considerations: 1) is it adequate to focus on states represented by just a few simplices with faces which have large areas (i.e., dual graphs whose edges have large j values); or, 2) Must we consider states with lots of edges with low j values? • As we will see, the answer depends on the physical context. Need sharper formulations. Also, the discussion on dynamics has to be divided into two parts: In low energy physics, A) What is the adequate description for (boundary) states; and B) What is the adequate approximation for calculating transition amplitudes for given semi-classical boundary states. I will emphasize the quantum geometry perspective (as opposed to spin foams).