(2, 2) terms#
Second type of the bilinear terms, in which spin operators are associated with different sites. In other words, for these terms \(\boldsymbol{r}_{\mu,\alpha_1} \neq \boldsymbol{r}_{\mu + \nu_2, \alpha_2}\).
\[\begin{split}C_{2, 2}
\sum_{\substack{\mu, \nu_2, \\ \alpha_1, \alpha_2, \\ i_1, i_2}}
J^{i_1, i_2}_{\nu_2; \alpha_1, \alpha_2}
S_{\mu, \alpha_1}^{i_1}
S_{\mu + \nu_2, \alpha_2}^{i_2}\end{split}\]
Relevant API#
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Convention constant.
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Method to add the parameter to the Hamiltonian.
magnopy.SpinHamiltonian.remove()Method to remove the parameter from the Hamiltonian.
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An iterator over the parameters already added to the Hamiltonian.