Quaternionic Quantum Mechanics and Quantum Fields by Stephen L. Adler (Einstein Professor of Physics, Einstein Professor of Physics, Institute for Advanced Study, Princeton, New Jersey)
This book presents a new formulation of quantum mechanics using quaternionic, rather than complex, numbers. The author is a highly respected theoretical physicist who has been working on quaternionic quantum mechanics for the last fourteen years. The author clearly explicates the relations between quaternionic, complex and real quantum mechanics, and the book is certain to be a major contribution to theoretical physics. Accessible to readers with a first-year graduate level quantum mechanics course.