What is the meaning of a fully occupied state in the Fermi-Dirac distribution?

Click For Summary
SUMMARY

The discussion clarifies the meaning of a fully occupied state in the Fermi-Dirac distribution, emphasizing two scenarios: a state can be fully occupied by two electrons (one spin-up and one spin-down) or by a single electron. The interpretation of "state" varies; it can refer to an energy level with a degeneracy of two or to a specific quantum state, where the Pauli exclusion principle restricts occupancy to one electron. The term "orbital" or "spatial energy eigenfunction" is suggested as a more precise alternative to "state" in this context.

PREREQUISITES
  • Understanding of Fermi-Dirac statistics
  • Knowledge of quantum mechanics principles
  • Familiarity with the Pauli exclusion principle
  • Concept of energy levels and degeneracy in quantum systems
NEXT STEPS
  • Research the implications of the Pauli exclusion principle in quantum mechanics
  • Study the Fermi-Dirac distribution and its applications in solid-state physics
  • Explore the concept of quantum states and energy eigenfunctions
  • Learn about electron configurations and their significance in chemistry
USEFUL FOR

Students and professionals in physics, particularly those studying quantum mechanics and solid-state physics, as well as chemists interested in electron configurations and their implications.

Karim Habashy
Messages
31
Reaction score
1
Hi all,

The probability that a state is occupied means :

1) Fully Occupied by 2 electrons Spin up and Spin down
or
2) Occupied by 1 electron only .

Thanks
 
  • Like
Likes   Reactions: EmilyRuck
Physics news on Phys.org
It depends how state is defined :-p

Sometimes, state is taken to be "energy level," meaning that it has a degeneracy of 2, as the first case you mentioned. Sometimes, state refers to the actual quantum state, in which case the Pauli exclusion principle makes it a one-electron state.

You basically have to pay attention to what the author is saying (or worse, is implying).
 
  • Like
Likes   Reactions: EmilyRuck and Karim Habashy
Probably the term orbital or (spatial) energy eigenfunction better replaces the "state" in the first point.
 
  • Like
Likes   Reactions: EmilyRuck and Karim Habashy

Similar threads

  • · Replies 1 ·
Replies
1
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 11 ·
Replies
11
Views
4K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K