Questions tagged [exchange-interaction]
An effective, but not actual, force used for effective description of geometric effects between identical particles, such as the apparent repulsion between fermions due to the Pauli principle.
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DMI as a Superexchange?
Superexchnage interaction is an indirect exchange interaction between two magnetic ions; Anderson proposed a model that says the origin of this type of exchange is due to the arrangement of Molecular ...
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Ferromagnetism vs antiferromagnetism
In ferromagnetism the spins align in the same direction, but in antiferromagnetism the spins align in the opposite direction. Both are due to the so-called 'exchange interaction', with a negative ...
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What is exactly "spin of atom"? [closed]
$$E_{\text{ex}}=-2 J_{\text{ex}} \mathbf{S}_i \mathbf{S}_j =-2 J \mathbf{S}_i \mathbf{S}_j \text{cos}\phi$$
I'm studying magnetism and often see sentences like "spin $i$ product spin $j$" ...
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Is electron capture the exchange of a virtual $W$-boson?
Betaplus: an upquark emits a $W^+$-boson which turns it into a downquark and then decays into a positron and electron neutrino.
Electron capture: an upquark emits a $W^+$-boson which is absorbed by a ...
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Calculating the Second Virial Coefficient
I have seen many different derivations of the second virial coefficient, but none of them explains how they turn a double integral into a single integral.
The second virial coefficient is:
$$
B_2=-\...
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Determining force of interaction from a decay equation
I have the decay equation
$$p + π^− → n + K^− + π^+.$$
I have been told the force of interaction in this is the weak nuclear force, but I was looking for an explanation of how you can work that out ...
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Can exchange interaction exist between electron and muon? [closed]
I'm studying about the exchange interaction and it's quite confusing.
Why does it happens between same kinds of particle?
How about electron and muon? Or one particle and another one which has all the ...
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Exchange interaction between neutral particles
I imagine the following thought experiment: Let us prepare two identical neutral fermions with identical spin and antisymmetric spatial wave function in one spatial dimension. Let the initial state be ...
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Is exchange interaction just a consequence of approimations?
My background is in molecular physics, and I have encountered the term 'exchange interaction' in this context first, but it seems to be used in many areas of physics.
In my understanding, seems to be ...
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Discussion on exchange energy
When we ionize hydrogen (no exchange energy in hydrogen) by supplying energy to it, electron use it to break the attraction between the nucleus and itself and comes out of the reach of the nucleus. ...
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How do spins interact with each other?
When talking about magnetism and the interaction of spins, the most basic model seems to be the Heisenberg model with an interaction of the form $ -J \vec{S}_1\cdot \vec{S}_2$. The origin of the ...
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Significance of Self-Interaction in Hartree Potential
According to DFT (and correct me if I'm incorrect) the terms of Hartree potential and exchange correlation potential are introduced to simulate the particle (fermion-fermion) interaction in our system ...
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I'm trying to solve the expression for Dirac exchange, but I'm not understanding the variables change employed. How can I perform it? [closed]
I'm trying to perform the variables change employed in the book "Density Functional Theory of Atoms and Molecules", by Parr and Weitao - page 108. But, from the expression of \rho_{1} given ...
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Evidence for indistinguishable particles
What's the simplest evidence for indistinguishable particles? Is there any evidence/experiment without resorting to large ensemble/statistical results?
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Exchange interaction and nuclear fusion
Most texts about nuclear fusion say that the reason it is so hard to get protons to fuse is the strong Coulombic repulsion between them. However, it seems to me that at close distances, protons should ...
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