$PT$-symmetric classical mechanics

Abstract

This paper reports the results of an ongoing in-depth analysis of the classical trajectories of the class of non-Hermitian $PT$-symmetric Hamiltonians $H=p^2+x^2(ix{)}^{\epsilon }$ ($\epsilon \ge 0$). A variety of phenomena, heretofore overlooked, have been discovered such as the existence of infinitely many separatrix trajectories, sequences of critical initial values associated with limiting classical orbits, regions of broken $PT$-symmetric classical trajectories, and a remarkable topological transition at $\epsilon =2$. This investigation is a work in progress and it is not complete; many features of complex trajectories are still under study.

21 pages, 22 figures, special issue