Vacuum Diagrams in Perturbative Thermo Field Dynamics : Particles and Fields

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概要

• 論文の詳細を見る

• Perturbation theory in thermofield dynamics (a real time finite temperature quantum field theory) is formulated in the interaction representation and a diagrammatic expansion for the expectation value of time ordered products is derived solely on the basis of the thermal state condition and the algebraic properties of the operators. This new formulation has a much wider domain of applicability than those presented previously. The method is applicable even in the case of purely quantum mechanical systems. When certain bosonic operators, which commute with the unperturbed Hamiltonian, contribute to the renormalization of the thermal state vacuum the vacuum diagrams do not cancel in the usual way. It will be shown how these diagrams arise and how they may be computed.

• 理論物理学刊行会の論文
• 1986-07-25

著者

• MATSUMOTO H.

  Department of Physics, University of Alberta

• UMEZAWA H.

  Department of Physics, University of Alberta

• MATSUMOTO Hideki

  Institute for Materials Research, Tohoku University

• Whitehead J

  Department Of Physics Memorial University Of Newfoundland

• Umezawa H

  Fdk Corp. Shizuoka Jpn

• Whitehead J.p.

  Department Of Physics Memorial University Of Newfoundland

• Umezawa H.

  Department Of Physics The University Of Alberta

• Matsumoto Hideki

  Dipartimento Di Fisica Teorica E Sue Metodologie Per Le Scienze Applicate Universita Di Salermo

• MATSUMOTO Hideki

  Applied Physics, Seikei University

• MATSUMOTO Hideki

  Department of Applied Physics, Seikei University:(Present address)Institute of Physics,Univ. of Tsukuba

• MATSUMOTO Hideki

  Department of Physics, University of Alberta, Edmonton, Alberta

• WHITEHEAD J.P.

  Department of Physics, Memorial University of Newfoundland

• Hatsumoto H.

  Department of Physics, The University of Alberta

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