Quantum Field Theory with Finite Time Interval : Application to QED : Particles and Fields
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概要
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Diagrammatical expansion of the quantum field theory with the finite time interval is discussed by evaluating the time evolution kernel. The coherent state representation is adopted which is the most convenient formalism for this purpose. It is applied to quantum electrodynamics (QED) to derive the Feynman rule for the kernel. The rule for the matrix element of any operator is also given. Our method can also be a systematic approach to the time dependent perturbation theory. As an example, a full order formula of the transition amplitude between the number states is given in terms of the connected Green's functions.
- 理論物理学刊行会の論文
- 1991-07-25
著者
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Nomoto Kazumasa
Department Of Physics Faculty Of Science And Technology Keio University
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Fukuda Reijiro
Department Of Physics Faculty Of Science And Technology Keio University
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Fukuda Reijiro
Research Institute For Fundamental Physics Kyoto University
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FUKUDA Reijiro
Department of Physics,Faculty of Science and Technology Keio University
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NOMOTO Kazumasa
Department of Physics, Faculty of Science and Technology Keio University
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