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There is nothing such as a "locus of an object" to start with. Well, I would surely not argue that Wheeler has co-discovered any of the cool, more specific insights in quantum gravity of the recent years. It's the (approximate) locality in the extra holographic dimension that is the root of the holographic miracle. More generally, her thesis is dedicated to a fascinating topic of the "emergence of spacetime". You find local operators that commute at spacelike separations and reconstruct the spacetime dimension from ensembles of such local fields. Mark van Raamsdonk has made insights of this sort and Ryu and Takayanagi (I also know the latter guy, Tadashi, from Harvard, a nice guy) presented their formula which is "quantitatively" an emulation of the Bekenstein-Hawking formula for the entropy and area but has. The extra radial dimension means that the operators (phi(x,y,z,t) in (CFT_4) may be given an extra continuous label, (r and be reorganized as (phi(x,y,z,r,t which commute or anticommute according to the separation measured in a five-dimensional spacetime. But how does it work? The local operators and "points" are simply not as easily definable as in non-gravitational theories. Because physicists may reduce many or all aspects about the geometric relationships in the spacetime to the quantum entanglement which is basically a "research of information they are finding new proofs of John Wheeler's prophesy "everything is information".

Generalizations of the AdS/CFT correspondence
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What Wheeler may have been imagining was probably much more primitive. The ability of the information to get out of the black hole through the Hawking radiation is an example of a "small violation of the locality". Most obviously, two such operators (phi(x,y,z,r_1,t) and (phi(x,y,z,r_2,t) supercommute with each other because they become spacelike-separated. Also, RAF III was able to notice that the thesis refers to a 2013 TRF blog post. This negative statement has to hold because the "existence of entanglement which is dual to it, isn't an observable, either. There's no safe way to count the number of copies of objects inside the black holes if causality (of two black holes' geometry) prevents you from observing both/all copies at the same moment. Einstein has unified space and time. Every time a paradigm shift like that takes place, we feel closer to the ultimate architecture underlying Nature. On the other hand, it's probably true that a blog post of mine was the first place where the claim and its justification was articulated explicitly. What I mean is that the locality means that the operators commute or anticommute at spacelike separation but the separation may only be determined relatively to a background metric but the metric tensor is a dynamical variable in quantum gravity so whether two "points" are. Additional papers by other authors verified some details about the correlation functions and wrapped branes and later excited strings and so on which is why I don't know a competent quantum gravity theorist who would seriously doubt that the AdS/CFT correspondence is an exact equivalence. String/M-theory-based) theory, (AdS_d1 in an anti de Sitter space.