Four interacting spins: Addition of angular momenta, spin–spin correlation functions, and entanglement

We study four spins on a ring coupled through competing Heisenberg interactions between nearest neighbors, J, and next-nearest neighbors, J 2 ≡ α J > 0. From the pedagogical point of view, dealing with few spins illustrates how to add more than two angular momenta in a systematic way. The spectru...

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Veröffentlicht in:	American journal of physics 2024-08, Vol.92 (8), p.606-615
Hauptverfasser:	dos Santos, Raimundo R., Oliveira, Lucas Alves, Costa, Natanael C.
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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