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Edward Witten is the most influential string theorists in the world, is now doing research into gravity that is decidedly non-string, and very similar to LQG.

here's a link

http://gesalerico.ft.uam.es/strings07/040_scientific07_contents/041_speakers.htm [Broken]

his research program is titled " Three-Dimensional Gravity Revisited"

and here's a discussion

http://www.math.columbia.edu/~woit/wordpress/?p=555

Peter Woit writes "If one wants to interpret this new work in light of the the LQG/string theory wars, it’s worth noting that the technique used here, reexpressing gravity in terms of gauge theory variables and hoping to quantize in these variables instead of using strings, is one of the central ideas in the LQG program for quantizing 3+1d gravity."

here's a link

http://gesalerico.ft.uam.es/strings07/040_scientific07_contents/041_speakers.htm [Broken]

his research program is titled " Three-Dimensional Gravity Revisited"

and here's a discussion

http://www.math.columbia.edu/~woit/wordpress/?p=555

Peter Woit writes "If one wants to interpret this new work in light of the the LQG/string theory wars, it’s worth noting that the technique used here, reexpressing gravity in terms of gauge theory variables and hoping to quantize in these variables instead of using strings, is one of the central ideas in the LQG program for quantizing 3+1d gravity."

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