{"slug":"thinker-richard-feynman","verification":{"valid":true,"entries":2,"head":"5fda98d0aa6db0ea74703180113e3534905ea03618c27a855018ddc0d1fab2df"},"count":2,"sources":[{"id":"s1","type":"other","url":"https://link.aps.org/doi/10.1103/RevModPhys.20.367","title":"Space-Time Approach to Non-Relativistic Quantum Mechanics","quote":"Non-relativistic quantum mechanics is formulated here in a different way... the probability amplitude is the sum over all paths of exp(iS/ℏ).","summary":"Original 1948 paper deriving the path integral formulation.","claim_ids":["c1","c2","c3"],"found_by":"grok/grok-4.3","extra":{},"accessed_at":"2026-07-07T07:35:59.173Z","link_status":"http_403","quote_status":"unverified","prev":"genesis","hash":"0e8df3f9bfbcfb77f661e5580884318381d76ca0ddea38db7c592e74b5d5f2a0"},{"id":"s2","type":"other","url":"https://www.feynmanlectures.caltech.edu/II_19.html","title":"The Feynman Lectures on Physics Vol. II Ch. 19: The Principle of Least Action","quote":"The true path is the one for which that integral is least.","summary":"Lecture presentation of the classical least-action principle and its consequences.","claim_ids":["c4"],"found_by":"grok/grok-4.3","extra":{},"accessed_at":"2026-07-07T07:35:59.173Z","link_status":"http_403","quote_status":"unverified","prev":"0e8df3f9bfbcfb77f661e5580884318381d76ca0ddea38db7c592e74b5d5f2a0","hash":"5fda98d0aa6db0ea74703180113e3534905ea03618c27a855018ddc0d1fab2df"}]}