Entropy and correlators in quantum field theory
It is well known that loss of information about a system, for some observer, leads to an increase in entropy as perceived by this observer. We use this to propose an alternative approach to decoherence in quantum field theory in which the machinery of renormalisation can systematically be implemente...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
10 April 2010
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| In: |
Annals of physics
Year: 2010, Volume: 325, Issue: 6, Pages: 1277-1303 |
| DOI: | 10.1016/j.aop.2010.02.016 |
| Online Access: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.aop.2010.02.016 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S0003491610000485 
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| Author Notes: | Jurjen F. Koksma, Tomislav Prokopec, Michael G. Schmidt |
| Summary: | It is well known that loss of information about a system, for some observer, leads to an increase in entropy as perceived by this observer. We use this to propose an alternative approach to decoherence in quantum field theory in which the machinery of renormalisation can systematically be implemented: neglecting observationally inaccessible correlators will give rise to an increase in entropy of the system. As an example we calculate the entropy of a general Gaussian state and, assuming the observer's ability to probe this information experimentally, we also calculate the correction to the Gaussian entropy for two specific non-Gaussian states. |
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| Item Description: | Gesehen am 21.03.2023 |
| Physical Description: | Online Resource |
| DOI: | 10.1016/j.aop.2010.02.016 |