Eigenfunctions on a Stadium Associated with Avoided Crossings of Energy Levels

  title={Eigenfunctions on a Stadium Associated with Avoided Crossings of Energy Levels},
  author={B. NEUBERGER and J. W. Neuberger},
The most primitive form of a stadium is a circle, say of radius r. If we separate the left and right halves of the circle slightly and connect these two semi circles at the top and bottom by straight lines we have a classical stadium (racetrack). Let a be the horizontal distance from the center of the figure to either the left or right semi circle; that is, the distance of each ‘straightaway’ is 2a. 

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