The Ejs Hénon-Heiles Poincare model computes the solutions to the non-linear Hénon-Heiles Hamiltonian, which reads, ½ (pₓ² + py² + x² + y²) + x² y – 1/3 y³. The simulation displays a three-dimensional plot of phase space for the y dimension and the projection of the plane where x = 0 showing the Poincare section. The evolution parameters can be changed via textboxes. You can modify this simulation if you have Ejs installed by right-clicking within the plot and selecting “Open Ejs Model” from the pop-up menu item. Ejs Hénon-Heiles Poincare model was created using the Easy Java Simulations (Ejs) modeling tool. It is distributed as a ready-to-run (compiled) Java archive. Double clicking the ejs_ehu_chaos_Henon_Poincare.jar file will run the program if Java is installed. Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models. Additional Ejs models for non-linear dynamics and chaos are available. They can be found by searching ComPADRE for Open Source Physics, OSP, or Ejs.


  • Computer Science > General
  • Mathematics > General

Education Levels:

  • Grade 1
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