Path-Integral Methods and Their Applications

This book presents the major developments in this field with emphasis on application of path integration methods in diverse areas. After introducing the concept of path integrals, related topics like random walk, Brownian motion and Wiener integrals are discussed. Several techniques of path integration including global and local time transformations, numerical methods as well as approximation schemes have been presented. The book seeks to provide a proper perspective of some of the most recent exact results and approximation schemes for practical applications.