Heidi
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I can see how spinfoams and spin networks can describe the structure of space and time. But i have not seen what is added so that there is gravity. is it a less action principle?u
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weirdoguy
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Heidi said:
What is gravity in the context of classical GR?
Heidi
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In GR we have an equality relating the geometry and the energy momentum it cotains. so we get geodesics and derivatives.
Here the networks are not embedded in the classical space time.
Here the networks are not embedded in the classical space time.
weirdoguy
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Heidi said:
Well, in a way they constitute spacetime. And since gravity can be thought of as geometry of spacetime, and since you've said that you see how spinfoams and networks are related to spacetime, then I guess that would mean that you should see how they are related to gravity
Heidi
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I asked the question because i did not succeed. Did you?