Scattering of light by light is a fundamental process arising at the quantum level through vacuum fluctuations. This book will explain how this quantum process can entirely be described in terms classical quantities. This description is derived from general principles, such as causality, unitarity, Lorentz, and gauge symmetries.

Scattering of light by light is a fundamental process arising at the quantum level through vacuum fluctuations. This book will explain how this quantum process can entirely be described in terms classical quantities. This description is derived from general principles, such as causality, unitarity, Lorentz, and gauge symmetries.