A theory of quantum gravity, which aims to merge quantum mechanics and general relativity, postulating that the structure of space is composed of finite loops woven into an extremely fine fabric or network.
Questions tagged [loop-quantum-gravity]
154 questions
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What is the basic idea of loop quantum gravity?
I have researched a little on loop quantum gravity (LQG), but all I got were very ambiguous explanations about loops and nodes that all end with mathematical equations.
If someone could give me a non-mathematical, clear idea of LQG, I would really…
QFTUNIverse
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Expansion Mechanism in Loop Quantum Gravity
Loop Quantum Gravity suggests that spacetime is quantized. Given that, what is the mechanism of expansion? Do more quanta appear out of nowhere or do the quanta grow larger?
Ray Salemi
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Can loop quantum gravity use known techniques to cure the fermion doubling problem?
It is well known that LQG has a fermion doubling problem and therefore cannot include chiral fermions.
https://arxiv.org/abs/1507.01232
However, there are already many known techniques to dealing with fermion doubling, such as staggered fermions. So…
Jag
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Diffeomorphism constraint in loop quantum gravity
I am reading Canonical Quantization of Spherically Symmetric Gravity in Ashtekar’s Self-Dual Representation by Thiemann and Kastrup [a] and also the book Modern canonical quantum general relativity by Thiemann [b].
I have noticed that what [b] calls…
mattiav27
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Loop quantum gravity: shape?
What kind of shape of the universe is being suggested in loop quantum gravity?
From what I know LQG postulates a more or less discrete universe, rather than a continuous one.
Does this also mean that it postulates that space is finite? Like, for…
hal3m
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