: Astronomy: loop quantum gravity

theoretical physics aspects > unified theory > quantum gravity > loop quantum gravity

theoretical physics aspects > unified theory > theory of everything > loop quantum gravity

loop quantum gravity

Loop quantum gravity (LQG) is a theory of quantum gravity, which aims to merge quantum mechanics and general relativity, incorporating matter of the Standard Model into the framework established for the pure quantum gravity case. It is an attempt to develop a quantum theory of gravity based directly on Einstein's geometric formulation rather than the treatment of gravity as a force. As a theory LQG postulates that the structure of space and time is composed of finite loops woven into an extremely fine fabric or network. These networks of loops are called spin networks. The evolution of a spin network, or spin foam, has a scale above the order of a Planck length, approximately 10⁻³⁵ meters, and smaller scales are meaningless. Consequently, not just matter, but space itself, prefers an atomic structure. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Loop_quantum_gravity)

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