Permanent magnets: do electrons attract each other?

steviereal
Messages
17
Reaction score
0
When reading about the quantum explanation of permanent magnets, I only read about electron spins. Sure, but are they behind that aggressive attractive force existing between opposite poles? Common sense tells me the only things that should attract each other in a metal are electrons and protons. Surely it's not electrons only, they should not attract each other, no matter what their spins are, right? So does this spin asymmetry ultimately create a dipole atom? Does it distort the electron cloud, so that one pole will be the side with the larger bulging part of the cloud, the other will be the nucleus (being the smaller part of the electron cloud on the other side)?
Something like this should be happening, right? Otherwise, we are left with dissatisfying answers such as: "well, magnetism is magnetism" or "we just don't know".
 
Physics news on Phys.org
Positive and negative charges are attracted to each other via the electrostatic force. Whilst this is related to the magnetic force (hence the name 'electromagnetism'), they are not entirely the same thing. Magnetism is the manifestation of the electrostatic force that occurs when a charged object is moving i.e. when there is a current. If you have knowledge of special relativity, look here for an explanation. A spinning electron constitutes a very small loop of current, so there is a magnetic field in addition to the electric field produced by the charge. I'm not sure if that answers all of your questions, as some of them are not completely clear to me.
 
  • Like
Likes bhobba
sk1105 said:
Positive and negative charges are attracted to each other via the electrostatic force. Whilst this is related to the magnetic force (hence the name 'electromagnetism'), they are not entirely the same thing. Magnetism is the manifestation of the electrostatic force that occurs when a charged object is moving i.e. when there is a current. If you have knowledge of special relativity, look here for an explanation. A spinning electron constitutes a very small loop of current, so there is a magnetic field in addition to the electric field produced by the charge. I'm not sure if that answers all of your questions, as some of them are not completely clear to me.
Thanks!
Now I understand it by accepting the rules of relativity...the only thing I have to understand now is why objects contract when they move...
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
If we release an electron around a positively charged sphere, the initial state of electron is a linear combination of Hydrogen-like states. According to quantum mechanics, evolution of time would not change this initial state because the potential is time independent. However, classically we expect the electron to collide with the sphere. So, it seems that the quantum and classics predict different behaviours!
According to recent podcast between Jacob Barandes and Sean Carroll, Barandes claims that putting a sensitive qubit near one of the slits of a double slit interference experiment is sufficient to break the interference pattern. Here are his words from the official transcript: Is that true? Caveats I see: The qubit is a quantum object, so if the particle was in a superposition of up and down, the qubit can be in a superposition too. Measuring the qubit in an orthogonal direction might...
Back
Top