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The Schwinger Action Principle and Effective Action by David J. Toms

The Schwinger Action Principle and Effective Action

by David J. Toms
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Book cover type: Hardcover
  • ISBN13: 9780521876766
  • Binding: Hardcover
  • Subject: N/A
  • Publisher: Cambridge University Press
  • Publisher Imprint: Cambridge University Press
  • Publication Date:
  • Pages: 508
  • Original Price: GBP 169.0
  • Language: English
  • Edition: 1
  • Item Weight: 1003 grams
  • BISAC Subject(s): Physics / Mathematical & Computational

This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models including Bose-Einstein condensation, the Casimir effect, and trapped Fermi gases. The book begins with a brief review of the action principle in classical mechanics and classical field theory. It then moves on to quantum field theory, focusing on the effective action method. This is introduced as simply as possible by using the zero-point energy of the simple harmonic oscillator as the starting point. The book concludes with a more complete definition of the effective action, and demonstrates how the provisional definition used earlier is the first term in the systematic loop expansion. The renormalization of interacting scalar field theory is presented to two-loop order. This book will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics.

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