this is a "connecting the dots" thread about two particular series of papers that I'm watching(adsbygoogle = window.adsbygoogle || []).push({});

In one set of papers, Freidel et al identify a form of Quantum Gravity that is LATENT in (Feynman diagrams of) Quantum Field Theory.

Latent means hidden, which is the word Freidel uses in the titles:

Hidden Quantum Gravity in 3d Feynman diagrams

http://arxiv.org/abs/gr-qc/0604016

Hidden Quantum Gravity in 4d Feynman diagrams: Emergence of spin foams

[To appear]

In essence, Freidel et al have found a form of spinfoam QG that reduces to the usual flat matter QFT when you turn off gravity. In this spinfoam model, if you let the newtonconstant go to zero (G_{N}-> 0) you get Feynman diagrams and Feynman graph amplitudes.

Freidel's attitude is that it was the QG model that was "there all along" waiting to be discovered concealed in usual QFT: the basis of the usual Standard Model of matter in flat Minkowski space.

See references therein to earlier Freidel et al papers in this series

(including one by Freidel and Majid earlier this year)

=============

I would like to see a bridge connecting to this other series of papers by Ashtekar et al, the first of which will appear soon inPhysical Review Letters

Quantum Nature of the Big Bang

http://arxiv.org/abs/gr-qc/0602086

Quantum Nature of the Big Bang: An Analytical and Numerical Investigation I

http://arxiv.org/abs/gr-qc/0604013

References therein to related work by Ashtekar, Bojowald and others---in particular Bojowald's Living Reviews article.

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# Latent QG and the Quantum Nature of the Big Bang

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