open_problems
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| + | **The 5 Great Problems** | ||
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| + | - __The problem of quantum gravity.__ This is the problem of combining general relativity and quantum theory into one theory. Such a theory would be able to describe all known interactions of nature. | ||
| + | - __The problem of quantum theories.__ This is the problem of understanding quantum such that it makes sense and solve its fundamental problems. | ||
| + | - __The unification of the particles and forces.__ Still no theory exists that unifies all known particles and interactions into a single fundamental entity. | ||
| + | - __Explain the constants of nature.__ The standard model of particle physics has 20+ free parameters that need to be inferred from experiments. It is an open problem to understand how these values are "chosen" by nature. | ||
| + | - __Explain dark matter and dark energy.__ If they really exists, as suggested by experiments, we need to understand what they consists of. In addition, the constants of the standard model of cosmology need the be explained. | ||
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| + | For more information, see the chapter "The Five Great Problems in Theoretical Physics" in the book "Time Reborn" by Lee Smolin. | ||
| ===== Lists of Open Problems ===== | ===== Lists of Open Problems ===== | ||
| + | * [[https://arxiv.org/abs/1804.08730|Life, the universe, and everything - 42 fundamental questions]] by Roland E. Allen, Suzy Lidström | ||
| * http://math.ucr.edu/home/baez/physics/General/open_questions.html | * http://math.ucr.edu/home/baez/physics/General/open_questions.html | ||
| * https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics | * https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics | ||
open_problems.txt · Last modified: 2019/02/08 09:24 by 129.13.36.189
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