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Effective action approach to the dynamical map

    https://doi.org/10.1142/S0217732324500895Cited by:0 (Source: Crossref)

    The dynamical map represents a fundamental concept in quantum field theory, providing a solution of the field equations in the Fock space of asymptotic fields. In this paper, we show how to express the dynamical map of a scalar field in the language of quantum effective action. This grants us new insights into the study of topological defects in quantum field theory by showing a connection between the usual least-action principle and Umezawa’s boson transformation method.

    PACS: 03.70.+k, 11.10.−z, 11.15.Bt, 11.27.+d, 11.30.Qc, 11.90.+t