# Tag Info

1

Our studies of elementary particles have concluded that there are four fundamental interactions between them, and, as all matter is composed ultimately of elementary particles all matter is governed by these four. The strength of the fundamental interactions is given by the coupling constants which are constants multiplying the integrals which describe the ...

0

Exchange interaction, which is a fancy way of saying spin-spin interaction. However, conditions have to be right (below Curie temperature) otherwise entropy washes the order out. Two electrons have a total wavefunction $\psi(x_1,x_2, s_1, s_2)$ that is antisymmetric (changes sign) when we interchange $x_1,x_2$ and $s_1, s_2$ (Pauli exclusion principle). You ...

0

A particle's interaction(with anything it can interact with) can be thought of as ,it making a measurement (of the physical quantity associated with the interaction-eg electric field in case of charged particles interaction)and acting accordingly This isn't the correct way to think about interactions, and as you later point out this (kind of) violates ...

Top 50 recent answers are included