ABSTRACT
This text explains the features of quantum and statistical field systems that result from their field-theoretic nature and are common to different physical contexts. It supplies the practical tools for carrying out calculations and discusses the meaning of the results. The central concept is that of effective action (or free energy), and the main t
TABLE OF CONTENTS
part I|2 pages
THE PATH INTEGRAL IN QUANTUMMECHANICS
part II|2 pages
INTRODUCTION TO QUANTUM FIELD THEORY
part III|2 pages
MORE COMPLEX FIELDS AND OBJECTS