hello, friends in this forum. Do you provide me some cues in calculating the many-body wavefunction? such as the fpu-beta model, the Hamiltonian of it is(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

H=\sum_{i=1}^{N}\frac{p_{i}^{2}}{2}+\frac{(x_{i}-x_{i-1})^{2}}{2}+\frac{(x_{i}-x_{i-1})^{4}}{4}

[/tex]

,Thank you!

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# How to calculate the many-body wavefunction

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