I'm just beginning to look into loop quantum cosmology, and I've recently run into some fundamental confusion concerning how exactly the Friedmann equation fits in. Is it just that the application of loop quantum gravity yields a modified/effective Friedmann equation, or is it the other way around, such that the Friedmann equation is essential to the actual derivation of loop quantum gravity/cosmology? (Or both?) I feel as if I've misunderstood something very basic and very important somewhere here, so any kind of clarification would be apprecaited.(adsbygoogle = window.adsbygoogle || []).push({});

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# What exactly is the relation between LQG and the Friedmann equation?

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