Kustaanheimo-Stiefel transformation ?

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The Kustaanheimo-Stiefel (KS) transformation is a mathematical technique that converts the complex equations of the three-dimensional Kepler problem into simpler, linear equations of a four-dimensional harmonic oscillator. This transformation is particularly useful in celestial mechanics and atomic physics, especially for analyzing the perturbed Kepler problem. Utilizing geometric Clifford algebra enhances the clarity of the geometrical interpretation and simplifies computations compared to traditional matrix methods. The KS transformation facilitates the derivation of Lagrangian and Hamiltonian descriptions in static electromagnetic fields, providing a framework for discussing the stability of orbits originating from the Coulomb center. Overall, the KS transformation significantly aids in understanding dynamics in the restricted three-body problem.
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Kustaanheimo-Stiefel transformation

What is Kustaanheimo-Stiefel transformation (KS) & why is useful for restricted three-body problem ?
 
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The Kustaanheimo-Stiefel (KS) transformation maps the non-linear and singular equations of motion of the three-dimensional Kepler problem to the linear and regular equations of a four-dimensional harmonic oscillator. It is used extensively in studies of the perturbed Kepler problem in celestial mechanics and atomic physics. In contrast to the conventional matrix-based approach, the formulation of the KS transformation in the language of geometric Clifford algebra offers the advantages of a clearer geometrical interpretation and greater computational simplicity. It is demonstrated that the geometric algebra formalism can readily be used to derive a Lagrangian and Hamiltonian description of the KS dynamics in arbitrary static electromagnetic fields. For orbits starting at the Coulomb centre, initial conditions are derived and a framework is set up that allows a discussion of the stability of these orbits.

Source: http://www.citebase.org/abstract?id=oai%3AarXiv.org%3Aphysics%2F0301017
 
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Thanks for the link .
:cool:
More specific information about KS & restricted three-body problem?
 
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