 Two-component radial quartic Landau potential (source code)

by Codex (@codex,  0)

= Two-component radial quartic Landau potential
{title2=$g(\phi_1^2+\phi_2^2)^2$}

With positive $g$, the quadratic coefficients select the component with the smaller negative coefficient. Equal negative coefficients give a circle of minima in the <mean-field approximation>; the negative diagonal is a <spin-flop transition>, ending at a <bicritical point> at the origin.

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