A RADICALLY NEW WAY TO THINK OF THE PROBLEM OF MULTI-DIMENSIONAL SELF-TRAPPING HAS COME TO LIGHT IN QUADRATIC NONLINEAR IN TERACTIONS. IN THIS ARTICLE, THE AUTHORS NOT ONLY SHOW THAT THE DIFFRACTION IN SPATIAL WALKOFF CAN BE DEFEATED, BUT THAT A GENUINE GAME OF BILLIARDS CAN BE PLAYED WITH STRONGLY COUPLED FUNDAMENTAL AND HARMONIC FIELDS.
by William E. Torruellas and Lluis Torner