Non-integrability of some Hamiltonians with rational potentials

Details Non-integrability of some Hamiltonians with rational potentials Non-integrability of some Hamiltonians with rational potentials

2006-10-06

arxiv.org/abs/math-ph/0610010v1

Physics

Mathematical Physics

33 pages

Scientific paper

In this work we compute the families of classical Hamiltonians in two degrees of freedom in which the Normal Variational Equation around an invariant plane falls in Schroedinger type with polynomial or trigonometrical potential. We analyze the integrability of Normal Variational Equation in Liouvillian sense using the Kovacic's algorithm. We compute all Galois groups of Schroedinger type equations with polynomial potential. We also introduce a method of algebrization that transforms equations with transcendental coefficients in equations with rational coefficients without changing essentially the Galoisian structure of the equation. We obtain Galoisian obstructions to existence of a rational first integral of the original Hamiltonian via Morales-Ramis theory.

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