GoKawiilWheeler's 1940 'One-Electron Universe' Idea Shaped Feynman's Physics
Physicist John Wheeler proposed to Richard Feynman in a 1940 phone call that every electron and positron in existence could be a single particle tracing a tangled path back and forth through time. Sections of this path moving forward in time appear as electrons, while sections looping backward appear as positrons. Physicist E. C. G. Stueckelberg independently arrived at a similar concept around the same period.
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While the literal claim of one universal electron didn't hold up—positrons are far rarer than electrons—the notion that antiparticles are simply particles traveling backward in time became a foundational concept in quantum field theory. Feynman built this insight into his diagrams and formalism, which remain central tools in particle physics today.
- Wheeler suggested all electrons/positrons might be one particle zigzagging through spacetime.
- Stueckelberg independently proposed a similar backward-time description of particle-antiparticle pairs.
- The backward-in-time interpretation of antiparticles influenced Feynman's Nobel-winning work despite the 'one electron' claim itself being abandoned.
Feynman's Thesis: A New Approach to Quantum Theory (book) — This article traces back to Feynman and Wheeler's early collaboration on time-symmetric electrodynamics, ideas that shaped Feynman's own path-integral thesis. Reading his original thesis gives direct insight into the reasoning that led to concepts like the one-electron universe and positrons as backward-moving electrons. It's a great way to explore the foundations of quantum electrodynamics straight from the source.
See Feynman's Thesis: A New Approach to Quantum Theory (book) on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: en.wikipedia.org, 2026-09-20
Published there as: “One-Electron Universe”
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