{"product_id":"the-schwinger-action-principle-and-effective-action-hardback-9780521876766","title":"The Schwinger Action Principle and Effective Action (Hardback) 9780521876766","description":"\u003cfont face=\"Georgia\"\u003e\r\n\u003cp\u003e\u003cfont size=\"6\"\u003eThe Schwinger Action Principle and Effective Action\u003c\/font\u003e\u003cbr\u003e\r\n\r\n\r\n\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eAn introduction to the Schwinger action principle for graduate students and researchers in theoretical physics.\u003c\/em\u003e\u003c\/p\u003e\r\n\r\n\r\n\u003cp\u003e\u003cfont size=\"4\"\u003eDavid J. Toms (Author)\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e9780521876766, Cambridge University Press\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003eHardback, published 15 November 2007\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e508 pages\u003cbr\u003e24.4 x 17 x 2.9 cm, 1 kg\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\r\n\r\n\r\n\u003cp align=\"justify\"\u003e\u003cstrong\u003e\u003cfont size=\"3\"\u003eThis 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.\u003c\/font\u003e\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003ePreface\u003cbr\u003e 1. Action principle in classical mechanics\u003cbr\u003e 2. Action principle in classical field theory\u003cbr\u003e 3. Action principle in quantum theory\u003cbr\u003e 4. The effective action\u003cbr\u003e 5. Quantum statistical mechanics\u003cbr\u003e 6. Effective action at finite temperature\u003cbr\u003e 7. Further applications of the Schwinger action principle\u003cbr\u003e 8. General definition of the effective action\u003cbr\u003e Appendices\u003cbr\u003e References\u003cbr\u003e Index.\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003eSubject Areas: General \u0026amp; world history [\u003ca title=\"See our other books on General \u0026amp; world history\" href=\"https:\/\/freshlyprintedbooks.co.uk\/search?q=%22General%20\u0026amp;%20world%20history%20%5BHBG%5D%22\"\u003eHBG\u003c\/a\u003e]\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\u003c\/font\u003e","brand":"Cambridge University Press","offers":[{"title":"Default Title","offer_id":45913118048536,"sku":"9780521876766","price":159.88,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/2037\/5320\/products\/9780521876766i_3d1dfafa-4508-4635-8cec-06d89a0e42bd.jpg?v=1691358741","url":"https:\/\/freshlyprintedbooks.co.uk\/products\/the-schwinger-action-principle-and-effective-action-hardback-9780521876766","provider":"Freshly Printed Books","version":"1.0","type":"link"}