Fermi gas
E57419
A Fermi gas is a quantum many-particle system composed of fermions that obey Fermi–Dirac statistics, often used to model electrons in metals, neutrons in neutron stars, and ultracold atomic gases.
Aliases (1)
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
ideal quantum gas
→
quantum many-body system → theoretical physics model → |
| applicableTo |
electrons in a metal conduction band
→
neutron matter in neutron stars (approximation) → nucleons in atomic nuclei (approximation) → trapped ultracold fermionic atoms → |
| assumes |
indistinguishable fermions
→
occupation numbers 0 or 1 per state → |
| characterizedBy |
Fermi energy
→
Fermi momentum → Fermi temperature → |
| composedOf |
fermions
→
|
| contrastedWith |
Bose–Einstein gas
→
|
| describedIn |
statistical mechanics
→
|
| equationOfStateDependsOn |
particle density
→
spin degeneracy → temperature → |
| hasDistributionFunction |
Fermi–Dirac distribution
→
|
| hasProperty |
at most one fermion per single-particle quantum state
→
particles obey Pauli exclusion principle → pressure persists at zero temperature → quantum degeneracy at low temperature → supports Fermi pressure → |
| hasVariant |
degenerate Fermi gas
→
ideal Fermi gas → interacting Fermi gas → non-interacting Fermi gas → relativistic Fermi gas → spin-polarized Fermi gas → |
| limitCase |
classical ideal gas at high temperature and low density
→
|
| namedAfter |
Enrico Fermi
→
|
| obeys |
Fermi–Dirac statistics
→
|
| relatedToConcept |
Bose gas
→
Fermi liquid → Fermi surface → Pauli exclusion principle → degeneracy pressure → quantum degeneracy → |
| temperatureRegime |
quantum effects dominate below Fermi temperature
→
|
| usedIn |
astrophysics
→
cold atom physics → condensed matter physics → nuclear physics → |
| usedToExplain |
electronic heat capacity of metals
→
stability of white dwarfs and neutron stars via degeneracy pressure → |
| usedToModel |
electrons in metals
→
neutrons in neutron stars → ultracold atomic gases → |
Referenced by (2)
| Subject (surface form when different) | Predicate |
|---|---|
|
Pauli exclusion principle
("Fermi gas model")
→
|
isBasisFor |
|
Bose–Einstein condensate
→
|
isRelatedTo |