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  2. Freeman Dyson - Wikipedia

    en.wikipedia.org/wiki/Freeman_Dyson

    Freeman John Dyson FRS (15 December 1923 – 28 February 2020) [1] was a British-American theoretical physicist and mathematician known for his works in quantum field theory, astrophysics, random matrices, mathematical formulation of quantum mechanics, condensed matter physics, nuclear physics, and engineering.

  3. Dyson series - Wikipedia

    en.wikipedia.org/wiki/Dyson_series

    Dyson series. In scattering theory, a part of mathematical physics, the Dyson series, formulated by Freeman Dyson, is a perturbative expansion of the time evolution operator in the interaction picture. Each term can be represented by a sum of Feynman diagrams. This series diverges asymptotically, but in quantum electrodynamics (QED) at the ...

  4. Dyson sphere - Wikipedia

    en.wikipedia.org/wiki/Dyson_sphere

    Dyson sphere. A Dyson sphere is a hypothetical megastructure that encompasses a star and captures a large percentage of its power output. [1][2][3] The concept is a thought experiment that attempts to imagine how a spacefaring civilization would meet its energy requirements once those requirements exceed what can be generated from the home ...

  5. Schwinger–Dyson equation - Wikipedia

    en.wikipedia.org/wiki/Schwinger–Dyson_equation

    The Schwinger–Dyson equations (SDEs) or Dyson–Schwinger equations, named after Julian Schwinger and Freeman Dyson, are general relations between correlation functions in quantum field theories (QFTs). They are also referred to as the Euler–Lagrange equations of quantum field theories, since they are the equations of motion corresponding ...

  6. Dyson's eternal intelligence - Wikipedia

    en.wikipedia.org/wiki/Dyson's_eternal_intelligence

    Freeman Dyson in 2005. Dyson's eternal intelligence (the Dyson Scenario) is a hypothetical concept, proposed by Freeman Dyson in 1979, by which an immortal society of intelligent beings in an open universe may escape the prospect of the heat death of the universe by performing an infinite number of computations (as defined below) though expending only a finite amount of energy.

  7. Astrochicken - Wikipedia

    en.wikipedia.org/wiki/Astrochicken

    Astrochicken. Astrochicken is the name given to a thought experiment expounded by theoretical physicist Freeman Dyson. An Astrochicken is a small, one-kilogram spacecraft, a self-replicating automaton that could explore space more efficiently than a crewed craft could due to its innovative mix of technology.

  8. Project Orion (nuclear propulsion) - Wikipedia

    en.wikipedia.org/wiki/Project_Orion_(nuclear...

    Freeman Dyson performed the first analysis of what kinds of Orion missions were possible to reach Alpha Centauri, the nearest star system to the Sun. [26] His 1968 paper "Interstellar Transport" ( Physics Today ) [ 27 ] retained the concept of large nuclear explosions but Dyson moved away from the use of fission bombs and considered the use of ...

  9. Infinite in All Directions - Wikipedia

    en.wikipedia.org/wiki/Infinite_in_All_Directions

    16406078. Infinite In All Directions (1988) is a book on a wide range of subjects, including history, philosophy, research, technology, the origin of life and eschatology, by theoretical physicist Freeman Dyson. The book is based on the author's Gifford Lectures delivered in Aberdeen in 1985. Infinite in All Directions can roughly be summarized ...

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