Anti-symmetric electron wavefunctions

In summary, the many-particle wavefunction in a solid must be anti-symmetric with respect to exchange of any two electrons because electrons are fermions and cannot occupy the same state. This anti-symmetry ensures that if two fermions are in the same state, the function will collapse to zero. This is not the case for bosons, which can be packed into the same state.
  • #1
marcusl
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I'm reading Harrison's book on Solid State Theory, and he states without explanation that the many-particle wavefunction in a solid must be anti-symmetric with respect to exchange of any two electrons. I guess it may be obvious, but can someone explain why it's anti-symmetric?
 
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  • #2
Electrons are fermions, you can't have two in the same state. As such, the wave functions for fermions are created to be antisymmetric. That way, if you have two fermions in the same state, the function collapses to zero. because it's the negative of itself.

For bosons this isn't true and you can pack as many as you like into the same state.
 
  • #3
Thanks. I knew it had to be obvious!
 

Related to Anti-symmetric electron wavefunctions

What is an anti-symmetric electron wavefunction?

An anti-symmetric electron wavefunction is a mathematical description of the probability of finding an electron in a particular state. It is anti-symmetric because it changes sign when the positions of two electrons are interchanged.

What is the significance of anti-symmetric electron wavefunctions in quantum mechanics?

In quantum mechanics, the wavefunction is used to describe the behavior and properties of particles, including electrons. The anti-symmetric nature of electron wavefunctions is essential for understanding the behavior of electrons in atoms, molecules, and other systems.

How do anti-symmetric electron wavefunctions relate to the Pauli exclusion principle?

The Pauli exclusion principle states that no two electrons can occupy the same quantum state simultaneously. Anti-symmetric electron wavefunctions obey this principle, as they change sign when two electrons are in the same state, preventing them from occupying the same space.

What are some examples of anti-symmetric electron wavefunctions?

Some examples of anti-symmetric electron wavefunctions include the spin wavefunction, which describes the spin of an electron, and the molecular orbital wavefunction, which describes the distribution of electrons in a molecule.

How are anti-symmetric electron wavefunctions related to other types of wavefunctions in quantum mechanics?

Anti-symmetric electron wavefunctions are a type of fermionic wavefunction, which is a class of wavefunctions that describes particles with half-integer spin, such as electrons. They are also related to other types of wavefunctions, such as bosonic wavefunctions, which describe particles with integer spin.

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