Wiktionary

fermion

See also: Fermion, fermión, and férmion

English

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Etymology

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From Fermi +‎ -on. Named after Italian-American physicist Enrico Fermi. Coined by English physicist Paul Dirac in 1945 in a lecture titled "Developments in Atomic Theory".

Pronunciation

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Noun

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fermion (plural fermions)

  1. (particle physics, Standard Model) Any elementary or composite particle that has half-integer spin and thus obeys Fermi–Dirac statistics and the Pauli exclusion principle (equivalently, a particle for which the wavefunction of any system of identical such particles changes sign whenever two are swapped); a baryon, a lepton or a quark;
    (slightly more loosely) any such particle or any composite particle composed of fermions.
    The fermions treated by the Standard Model are the (composite) baryons and the (elementary) leptons and quarks.
    According to the spin–statistics theorem, the wavefunction of a system of identical fermions (particles of half-integer spin) is antisymmetric under the operation of swapping any two particles.
    • 1994, István Montvay, Gernot Münster, Quantum Fields on a Lattice, Cambridge University Press, page 208:
      A remarkable feature of lattice regularization is the appearance of several fermion species per fermion field in the lattice action.
    • 1996, Georges Bouzerar, Didier Poilblanc, “Persistent Currents in Interacting Electronic Systems”, in T. Martin, G. Montambaux, J. Trân Thanh Vân, editors, Correlated Fermions and Transport in Mesoscopic Systems, Editions Frontieres, page 149:
      For 2D systems, going beyond first order pertu[r]bative calculations, we show that the second harmonic of the current is strongly suppressed in the case of spinless fermion models but significantly enhanced for the Hubbard model.
    • 1996, Georg G. Raffelt, Stars as Laboratories for Fundamental Physics, University of Chicago Press, page 253:
      It is not known whether the Higgs mechanism is the true source for the masses of the fundamental fermions.
    • 2023 July 6, Jennifer Chu, “MIT physicists generate the first snapshots of fermion pairs”, in MIT News‎[1]:
      The snapshots were taken by MIT physicists and are the first images that directly capture the pairing of fermions — a major class of particles that includes electrons, as well as protons, neutrons, and certain types of atoms.

Hyponyms

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Coordinate terms

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Derived terms

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Translations

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See also

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Further reading

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Dutch

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Dutch Wikipedia has an article on:
Wikipedia nl

Etymology

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From Enrico Fermi (Italian-American physicist) +‎ -on.

Pronunciation

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  • Audio:(file)
  • Hyphenation: fer‧mi‧on

Noun

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fermion n (plural fermionen)

  1. (physics) fermion

Esperanto

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Noun

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fermion

  1. accusative singular of fermio

French

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Pronunciation

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Noun

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fermion m (plural fermions)

  1. (physics) fermion

Indonesian

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Etymology

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Borrowed from English fermion.

Noun

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fermion (first-person possessive fermionku, second-person possessive fermionmu, third-person possessive fermionnya)

  1. (physics) fermion.

Polish

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Polish Wikipedia has an article on:
Wikipedia pl

Etymology

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Borrowed from English fermion.

Pronunciation

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Noun

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fermion m inan

  1. (particle physics) fermion

Declension

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Declension of fermion
singular plural
nominative fermion fermiony
genitive fermionu fermionów
dative fermionowi fermionom
accusative fermion fermiony
instrumental fermionem fermionami
locative fermionie fermionach
vocative fermionie fermiony

Derived terms

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adjective

Further reading

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  • fermion in Polish dictionaries at PWN

Romanian

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Etymology

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Borrowed from English fermion.

Noun

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fermion m (plural fermioni)

  1. fermion

Declension

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Declension of fermion
singular plural
indefinite articulation definite articulation indefinite articulation definite articulation
nominative/accusative (un) fermion fermionul (niște) fermioni fermionii
genitive/dative (unui) fermion fermionului (unor) fermioni fermionilor
vocative fermionule fermionilor
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