I'd like to understand better the connection between Hal Haggard's September ILQGS talk(adsbygoogle = window.adsbygoogle || []).push({});

http://relativity.phys.lsu.edu/ilqgs/

http://relativity.phys.lsu.edu/ilqgs/haggard091713.pdf

http://relativity.phys.lsu.edu/ilqgs/haggard091713.wav

and the talk he gave at PI two days ago:

http://pirsa.org/13110049/

Finite regions, spherical entanglement, and quantum gravity

Speaker(s): Hal Haggard

An exciting frontier in physics is to understand the quantum nature of gravitation in finite regions of spacetime. Study of these regions from "below'', that is, by studying the quantum geometry of finite regions emerging from loop gravity and spin networks has recently resulted in a new road to the quantization of volume and to evidence that there is a robust gap in the volume spectrum. In this talk I will complement these results with recent work onconformal field theories in a particular finite region, a spherical ball of space. This new view afforded from "above" gives insights into entanglement and the Reeh-Schlieder theorem, allows calculation of the entanglement spectrum, and suggestsa new route to constructing the Minkowski vacuum out of independent finite regions in quantum gravity.

The September talk posed this question:

"Can we choreograph entanglement to yield the Minkowski vacuum?"

and for future research suggested:

"Looking to engineer the Minkowski vacuum and its entanglement from spin network superposition."

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# Minkowski vacuum as superposition of spin networks? (Haggard at PI)

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