Decoherence in an interacting quantum field theory: the vacuum case
We apply the decoherence formalism to an interacting scalar field theory. In the spirit of the decoherence literature, we consider a “system field” and an “environment field” that interact via a cubic coupling. We solve for the propagator of the system field, where we include the self-energy correct...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
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26 March 2010
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Jahrgang: 81, Heft: 6, Pages: 1-33 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.81.065030 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.81.065030 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.81.065030 
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| Verfasserangaben: | Jurjen F. Koksma and Tomislav Prokopec, Michael G. Schmidt |
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| 520 | |a We apply the decoherence formalism to an interacting scalar field theory. In the spirit of the decoherence literature, we consider a “system field” and an “environment field” that interact via a cubic coupling. We solve for the propagator of the system field, where we include the self-energy corrections due to the interaction with the environment field. In this paper, we consider an environment in the vacuum state (T=0). We show that neglecting inaccessible non-Gaussian correlators increases the entropy of the system as perceived by the observer. Moreover, we consider the effect of a changing mass of the system field in the adiabatic regime, and we find that at late times no additional entropy has been generated. | ||
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