xviii Introduction to the Tenth Anniversary Edition many fundamental challenges remain,and meeting those challenges promises to stimulate exciting and unexpected links among many disparate parts of physics,computer science, and information theory.We look forward to the decades ahead! -Michael A.Nielsen and Isaac L.Chuang,March,2010.xviii Introduction to the Tenth Anniversary Edition many fundamental challenges remain, and meeting those challenges promises to stimulate exciting and unexpected links among many disparate parts of physics, computer science, and information theory. We look forward to the decades ahead! – Michael A. Nielsen and Isaac L. Chuang, March, 2010