Author

De-Rong Xu

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Preprint Oct 2026

Construction of Approximate Invariants Across Nonlinear Resonances

Our previous work [Y.~Li, D.~Xu, and Y.~Hao, Phys. Rev. Accel. Beams \textbf{28}, 074001 (2025)] introduced a square-matrix method for constructing approximate invariants recursively, order by order, from the one-turn map of non-integrable Hamiltonian systems. At fourth and higher even orders, the recursive constructio...

Yong-Jun Li, De-Rong Xu, Yue Hao et al. · 0 citations