Wiktionary

Schrödinger's cat

English

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Alternative forms

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Etymology

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Named after Austrian physicist Erwin Schrödinger (1887–1961).

Noun

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Schrödinger's cat (plural Schrödinger's cats)

 
A depiction of the Schrödinger's cat (sense 1). Here the cat might be poisoned to death if a Geiger counter detects nuclear radiation; it might be alive vice versa.
  1. A hypothetical cat that is depicted as being surrounded by perfectly uncertain circumstances that make an external observer absolutely unable to deem the cat either alive or dead, especially if the possibilities of survival of the cat are expected to be analysed from the point of view of quantum mechanics. Typically, these circumstances involve the cat being inside a box while being the victim of a danger that may or may not kill it, such as radiation.
    • 2000, Thalia Field, Point and line, New Directions Publishing, →ISBN, page 8:
      A cat like yours is a Schrödinger's cat, sealed up in an office where someone's disintegration provides a 50-50 chance of its death.
  2. (by extension) Any hypothetical situation whose circumstances make it impossible to see which among two contrary propositions is correct, especially if the situation is expected to be analysed from the point of view of quantum mechanics.
    • 2004, Colin Bruce, Schrödinger's Rabbits: The Many Worlds of Quantum, page 83:
      To see how, let us consider a nested system of Schrödinger's cats.

Derived terms

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Proper noun

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Schrödinger's cat

  1. The thought experiment which was devised by Erwin Schrödinger, is usually considered a paradox, involves a Schrödinger's cat and is typically supposed to be analysed from the point of view of quantum mechanics.
  2. A Schrödinger's cat (a hypothetical cat that may or may not be dead) in particular, especially when implied to be the only Schrödinger's cat in the world.
    • 2005, Jürgen Pafel, Quantifier scope in German, illustrated edition, John Benjamins Publishing Company, →ISBN, page 21:
      Schrödinger's cat is necessarily alive or dead.
    • 2009, João Magueijo, A brilliant darkness, Basic Books, →ISBN, page 179:
      And you thought Schrödinger's cat was schizophrenic, unsure about life and death.
    • 2010, Rodrigo Enrico, The Physics of Stargates, Eridanus Press, →ISBN, page 80:
      Let us return to the laboratory, where Bob is about to lift the tarp off of the transparent box containing Schrödinger's cat.

Translations

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Further reading

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