Abstract
While the notion of open quantum systems is itself old, most of the existing studies deal with quantum mechanical systems rather than quantum field theories. After a brief review of field theoretical/path integral tools currently available to deal with open quantum field theories, we go on to apply these tools to an open version of ϕ3 + ϕ4 theory in four spacetime dimensions and demonstrate its one loop renormalizability (including the renormalizability of the Lindblad structure).
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Baidya, A., Jana, C., Loganayagam, R. et al. Renormalization in open quantum field theory. Part I. Scalar field theory. J. High Energ. Phys. 2017, 204 (2017). https://doi.org/10.1007/JHEP11(2017)204
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DOI: https://doi.org/10.1007/JHEP11(2017)204