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* Quantum electrodynamics. The problem for which Feynman won his Nobel Prize involved the probability of quantum states changing. He helped develop a sum over histories approach where every possible path from one state to the next is treated equally likely and the final path being a sum over the others. |
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* Quantum electrodynamics. The problem for which Feynman won his Nobel Prize involved the probability of quantum states changing. He helped develop a [path integral formulation]? of quantum mechanics, in which every possible path from one state to the next is considered, the final path being a sum over the possibilities. |
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