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Fermi-Dirac statistics

Fermi-Dirac statistics

9.9
A way to describe particles like electrons that cannot share the same energy state
  • noun
  • /ˈfɜrmi dɪˈræk ˈstætɪstɪks/
  • Specialized
translation icon : estadísticas de Fermi-Dirac
  • Since fermions such as 3He, with two protons, one neutron, and two electrons, have spin 1/2 and obey Fermi-Dirac statistics, they behave differently.

Examples

  • Scientists use Fermi-Dirac statistics to describe the distribution of particles in low-temperature physics.

  • In quantum mechanics, fermions follow the Fermi-Dirac statistics due to the Pauli exclusion principle.

  • It contained what came to be known as the Fermi-Dirac statistics.

    Academic text (1999)
  • One type, consisting of the leptons and the quarks, is made up of spin-1/2 particles that obey Fermi-Dirac statistics and hence are called fermions.

    Academic text (1997)
  • The behavior of electrons in a metal can be explained by the principles of Fermi-Dirac statistics.

Synonyms

distribution
vsFermi-Dirac statistics
  • Specialized
43 4.9

How numbers spread across a set of results, often shown on a graph

focuses on particle behavior limited by Pauli exclusion and sign-changing wave functions
statistical distribution
vsFermi-Dirac statistics
  • Specialized
1 5.3

A way to show how often different values occur in data like test scores

applies only to particles that cannot share a state and change sign when swapped

Surface Forms

Morphology

Fermi-Dirac + statistics

This term is an eponymous, technical label: 'Fermi-Dirac' refers to specific physicists and encodes specialized quantum-physics meaning that is not inferable from the common noun 'statistics' alone. A B1 learner who knows the ordinary word 'statistics' but not the domain-specific reference or the behavior of fermions would not be able to derive the MWE's meaning, so it is opaque.

Etymology

Fermi-Dirac statistics is named for the scientists Fermi and Dirac and uses the image of people taking seats: each 'seat' is like an energy state and each 'person' is like a particle, but only one 'person' may sit in a 'seat'. So, it means the rules for counting and arranging particles that cannot share the same state.