@proceedings {54159920, title = {Eigenfunctions and periodic orbits in classically chaotic systems: Order in chaos?}, journal = {AIP Conference Proceedings}, volume = {162}, year = {1987}, pages = {43{\textendash}59}, address = {Crystal City, VA, USA}, abstract = {We study the quantum mechanics of a Hamiltonian system which is classically chaotic: the stadium billiard. We have examined many of the eigenstates of the stadium, up to about the 10,000th. Complex periodic orbits play an active role in shaping the eigenstates.}, doi = {10.1063/1.36892}, url = {http://dx.doi.org/10.1063/1.36892}, author = {Heller, EricJ. and Patrick W. O{\textquoteright}Connor and John N. Gehlen} }