Why would “we mark up PEOPLE, PLACES, and THINGS” if “no interest in making something code consumable”? Humans are perfectly fine at semantic distinctions without markup…
The only reason for semantic markup is for other code to consume it. E.g. screen-readers, other people’s websites, search engines etc…Kartik Prabhu
@JeffreyM for some context:
The infrared structure here refers to the symmetries of asymptotic flat spacetimes given by the BMS group. This has been known for a long time in classical GR. Some recent work by Strominger relates these symmetries to the so-called “soft theorems” in scattering calculations (involving gravitons) in perturbative QFT. In essence, what it says is, since the BMS group is infinite-dimensional, there is an infinite-dimensional degeneracy in what one would like to call the “asymptotic ground state”.
How this shakes out for the information “paradox” remains to be seen.Kartik Prabhu
Any theory of quantum gravity should reproduce General Relativity in the far asymptotic region (“infrared”). The infrared structure you quote comes purely from studying the symmetries of asymptotically flat spacetimes in General Relativity.
So even if we don’t have a full quantum theory of gravity, _any_ such theory better reproduce this structure to be physically viable.Kartik Prabhu