期刊论文详细信息
Symmetry Integrability and Geometry-Methods and Applications
Bäcklund Transformations for the Kirchhoff Top
article
Orlando Ragnisco1  Federico Zullo1 
[1] Dipartimento di Fisica Universitá Roma Tre and Istituto Nazionale di Fisica Nucleare
关键词: Kirchhof f equations;    B¨acklund transformations;    integrable maps;    Lax representation;   
DOI  :  10.3842/SIGMA.2011.001
来源: National Academy of Science of Ukraine
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【 摘 要 】

We construct Bäcklund transformations (BTs) for the Kirchhoff top by taking advantage of the common algebraic Poisson structure between this system and the sl (2) trigonometric Gaudin model. Our BTs are integrable maps providing an exact time-discretization of the system, inasmuch as they preserve both its Poisson structure and its invariants. Moreover, in some special cases we are able to show that these maps can be explicitly integrated in terms of the initial conditions and of the ''iteration time'' n . Encouraged by these partial results we make the conjecture that the maps are interpolated by a specific one-parameter family of hamiltonian flows, and present the corresponding solution. We enclose a few pictures where the orbits of the continuous and of the discrete flow are depicted.

【 授权许可】

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