Functional Methods in Quantum Field Theory and Statistical Physics

This text pays special attention to the use of those techniques which are fundamental to quantum field theory, in a wide variety of areas, including ordinary quantum mechanics, Euclidean field theory and quantum statistics at finite temperature.

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Providing a systematic introduction to the techniques which are fundamental to quantum field theory, this book pays special attention to the use of these techniques in a wide variety of areas, including ordinary quantum mechanics, quantum mechanics in the second-quantized formulation, relativistic quantum field theory, Euclidean field theory, quantum statistics at finite temperature, and the classical statistics of nonideal gas and spin systems. The extended chapter on variational methods and functional Legendre transformations contains completely original material.