The telescope

“Consider the existence of a concept at a large scale (temperature or time). Regard it as an average of a theory at a smaller scale. At the smaller scale, individual particles have a type of ‘energy’ (some intrinsic property) and a type of particle interaction that on average are compatible with the large scale concept and spatial gradients of it.”
 

https://link.springer.com/content/pdf/10.1007/JHEP07(2019)140.pdf

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