# Fermi Point - What is it?

I'm trying to learn more about the idea of the quantum vacuum being a superfluid and how that can unify physics, but after all the reading I've done I can't quite nail down a conceptual understanding of the Fermi point of a superfluid. So, can someone explain to me what a Fermi point actually is in very simple terms?

I'm fascinated by the potential that this theory has as a GUT, and any help to further my understanding of the topic is greatly appreciated.

• A Fermi point is just a Fermi surface reduced to a point. So I guess your problem is with Fermi surface, am I correct ? If yes, please check on Wikipedia and Condensed Matter Books, and come back with an explicit question. Thanks in advance. – FraSchelle Nov 21 '16 at 11:29

"The system is either fully gapped, or the Fermi surface is developed, or, what has most remarkable consequences, a singular point in the momentum space evolves - the Fermi point. If a Fermi point appears, as happens in superfluid $^3$He-A, at low energies the system is governed by a quantum field theory describing left-handed and right-handed fermionic quasiparticles interacting with effective gauge and gravity fields. Practically all the ingredients of the Standard Model emerge, together with Lorentz invariance and other physical laws. This suggests that maybe our quantum vacuum belongs to the same universality class ..."