Hi, can anyone give me a clear definition of the following two things(adsbygoogle = window.adsbygoogle || []).push({});

1) Wilson loop

2) Spin network (invented by Penrose, right???)

What do these quantities fysically mean???

PS : can anyone explain me what the term LOOP means in Loop quantum gravity. To what does it refer ?

regards

marlon

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# Help on QFT

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