ising full

[@mfoucault1984]

Great Lecture, great books on physics simulations, thank you for sharing Jos!

[@ludwigrasmijn8218]

@ 25:45 you still have S_i int he argument of the cosh but you used the fact that S_i is +1 or -1 so you can write the exponential as a cosh right? So i think it should not be in the argument of the cosh right?

[@JamesVestal-dz5qm]

I dont switch on my magnetic field in front of Paul Smith.

[@johanbaars8510]

I still dont really understand what K represents. Is it related to Bu_bohr, the external field times the bohr magnetron?

[@josthijssen6782]

The Hamiltonian reads -K sum_ij s_i s_j. This does not have to do with a magnetic field (the Bohr magneton is not used, we just have constants K and h), but with the coupling of nearest neighbour spins.

[@josthijssen6782]

The second term (h sum_i s_i) represents the effect of the magnetic field.

[@muratkaradag3703]

In which language did you write the Skript`? The simulation looks awesome.

[@josthijssen6782]

Dear Murat, thank you for your kind words. I wrote this a very long time ago in either F90 or C, don't remember. Meanwhile I wrote a much better python script. If you send me an email (you can find it by searching for me at the TU Delft, I do not want to disclose it at too many places), I can forward it to you.

[@user-pb4jg2dh4w]

31:51 i didn't understand the step after the Taylor expansion Thanks

[@josthijssen6782]

Thanks for your question; I find it hard to answer as the steps are straightforward and explained in the video. Is it the step leading to m^2 ~ qJ-1 or the conclusion from that? At Tc qJ=1, so qJ is expected to vary like A(Tc-T), where A is an arbitrary constant. I hope this helps.

[@igorbrenno1459]

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