Pauli's exclusion principle Definition and 26 Threads

Hello, I recently came across the following (apparent, I hope) paradox: suppose we have two H atoms. Now, a hydrogen atom is made up of one proton and one electron (fermions), so it is a boson. Then one could have two hydrogen atoms which are in the exact same state (including position). This...

So my question is why can't 2 object be at the exact same potion, (i.e. overlap). Why can't a +ve quark and electron just merge. In an universe where there is no force caused due to charge, why can't we just walk through a solid wall.

What happens if I shoot a fermion at another identical fermion at rest? For example, do the fermions stick together, or do they bounce? Let's ignore gravity, electro-magnetism, weak force and strong force. Edit: We are considering the Pauli exclusion principle.

Hi there, I have a problem to solve in Cosmology which says: "Write the formulas for the quantum kinetic energy of neutrons, protons and electrons as well as the formula for the gravitational energy for a neutron star that is comprised of free neutrons, protons and electrons in a ratio of Nn ...

Lepton Universality and Pauli Exclusion Put in a possibly oversimplified way, lepton universality says that electrons, muons, and taus all behave in the same way except for mass effects. The question is “Does this apply to Pauli exclusion?” Due to the Pauli exclusion principle, only two...

In introductory physics and chemistry, photon excitation is usually illstrated with a simple hydrogen molecule. I am wondering what happens if an electron is excited to an orbital that is already full. Would the orbital split up into different energy levels as hybridisation, so as not to violate...

I was reading some simplistic explanations of Pauli's Exclusion Principle (PEP) to explain a group of non-science people, and I came across this: For Fermions, even as pressure builds, no two can be located in the same energy state. This causes them to "stack up" in effect. Only under great...

I was reading about the Pauli Exclusion Principle and I had a doubt. This principle tells us that a maximum of two electrons can be present in an energy level and the spin of the electrons has to be in the opposite direction. But S orbital can hold a maximum of two electrons. This is fine but...

To which type of Fundamental forces below the Pauli's exclusion belong? Strong nuclear forces Coulomb forces Weak nuclear forces Gravitational forces

How do we prove Pauli's exclusion principle? My professor makes a Slater determinant and then merrily shows how it disappears when two columns or rows are same. That is not Pauli's principle, is it? It is based on an assumption that certain particles are described by certain states. So my...

What is the scope of Pauli's exclusion principle? When we say two particles in a system cannot have the same quantum state, how do we choose the system?

has anyone worked on using the spin of certain sister pairs of subatomic particles as digital communication that is that to have a device that spins one sister particle one way or another, that spins its sister particle in a receiver on the other side of the world or universe where a sensors...

Hi, I have been reading Bill Bryson's A Short History of Nearly Everything and have got to the bit about Pauli's Exclusion Principle. It states that 'certain pairs of subatomic particles, even when separated by the most considerable distances, can instantly 'know' what the other is doing.'...

I explained to myself that I don't fall through the ground due to electrons repelling. Using classical electrostatic repulsion. Once in a while I hear it explained through Pauli's exclusion principle (PEP). Do we need PEP to explain this, or is classical electrostatics enough?

The Pauli exclusion principle: is the quantum mechanical principle that no two identical fermions (particles with half-integer spin) may occupy the same quantum state simultaneously Quantum entanglement: the type of interaction is such that each resulting member of a pair is properly...

Hi I spent my last couple hours reading books and browsing this forum and web to get answer on my question, obviously in vain: I know that wave function for fermions should be antisymmetric, I know fermions spin should be half integer otherwise causality will broken (but I don't why yet)...

I know the principle says that no two fermions canNot have the same atomic number, but could you explain that in detail?

Pauli's Exclusion Principle - arbitrary?? I have a puzzle about Pauli's Exclusion Principle, which, as far as I understand it, (being neither mathematical nor a physicist), states that fermions (as opposed to bosons) can never occupy the same space at the same time - well something along those...

Pauli exclusion principles states and I paraphrase; No two fermions can occupy the same state; That being said, how can cooper pairs exist? Cooper pairs are when two fermions(electrons in this case) bound together ; If they are bound together, then they must occupy the same state;

Does the exclusion principle mean that no atom and sub atomic particles can exist at the same place? Can I safely say that in stars the gravity is opposed by this aspect or implication of the principle?

There must be a force repulsing the electrons for no more than two in the 1s state for example. What force is that? How is this principle connected to the HUP?

It's the second time I've posted this message, and my english simply sux, so excuse me if I will not be able to explain my misunderstanding quite clear. Let's imagine a verry long metal cable, which is heated at one head. The quasi-free electrons at that head, as their energy increases, must...

Can anybody help me understand how pauli's exclusion principle helps explain the existence of fine line structures in the emmission spectra for atoms, which could not be explained by Bohr's model.

Hi. I'm a sophomore undergrad studying chemistry at Rice University. I recently took quantum mechanics... and I now realize I should have gone into physics rather than chemistry. Ok. Whatever. Bosons are particles with integer spins (helium-4 atoms). Fermions are particles with half-odd...

I've heard quite abit of things about bosons and am quite confused. The biggest thing which distinguishes fermions from bosons, would be Pauli's exclusion principle. But I've also heard things about bosons having half- integer, while fermions have interger spin, among many others. I've also...

Pauli's exclusion principle states that no two fermions may occupy the same quantum state. But why is this so? Is there a "why" explanation, as opposed to merely saying that this is the way it is?