fermion

[化] 费米子

发音

其它 /ˈfɜːmɪɒn/

词形变化

fermions 复数 fermions

释义与例句

n.
  1. 1.

    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;

    物理

    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.

  2. 2.

    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.

    any such particle or any composite particle composed of fermions.

    物理

词汇关系

名词

上位词 2

particle subatomic particle

下位词 2

baryon lepton

相关短语

Dirac fermion Weyl fermion Majorana fermion heavy fermion

词源

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".

来源：wiktionary