Register to reply

Pauli Exclusion Principle and Entanglement

by g.lemaitre
Tags: entanglement, exclusion, pauli, principle
Share this thread:
Feb27-13, 11:51 PM
P: 274
How do fermions, which have vast amounts of empty space, know not to occupy the same space as another fermion? Do physicists say that the two fermions become entangled and that is what enables them to be "aware" of the "existence" of the other fermion? Is entanglement used as an explanation for how objects interact with each other?
Phys.Org News Partner Physics news on
New complex oxides could advance memory devices
Nature's designs inspire research into new light-based technologies
UCI team is first to capture motion of single molecule in real time
Feb28-13, 02:51 AM
P: 231
I'm not sure what you mean by "vast amounts of empty space", but in my view, the Pauli exclusion principle doesn't come in until the wavepackets of the fermions in question start to overlap. The PEP is a quantum interference effect anyway and they "feel" it whenever the wavepackets overlap. If they don't overlap, then they don't have the same (spatial) quantum numbers, and they can have the same spin without a problem, i.e. there is no PEP.
Feb28-13, 04:41 AM
P: 274
So entanglement is not used to explain how particles are aware of each others' space?

Feb28-13, 08:14 AM
P: 755
Pauli Exclusion Principle and Entanglement

The wave function of a number of indistinguishable particles looks like the wave function of entangled particles. But you cannot perform entanglement measurements on them even in principle. In order to do this, you have to have distinguishable particles (like in EPR experiments, where the particles usually move in different directions).

See also Arnold Neumeier's FAQ:

Register to reply

Related Discussions
Entanglement and the Pauli exclusion principle Quantum Physics 2
Pauli's exclusion principle and quantum entanglement Quantum Physics 3
Pauli Exclusion Principle Quantum Physics 6
Pauli exclusion principle Quantum Physics 4
Pauli exclusion principle Quantum Physics 6