Journal article 1090 views
Transport coefficients from the two particle irreducible effective action
Gert Aarts 
,
Jose M. MartÃnez Resco
,
Jose M. MartÃnez Resco
Physical Review D, Volume: "D68", Issue: 8, Start page: 085009
Swansea University Author:
Gert Aarts
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DOI (Published version): 10.1103/PhysRevD.68.085009
Abstract
We show that the lowest nontrivial truncation of the two-particle irreducible (2PI) effective action correctly determines transport coefficients in a weak coupling or 1/N expansion at leading (logarithmic) order in several relativistic field theories. In particular, we consider a single real scalar...
| Published in: | Physical Review D |
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| ISSN: | 0556-2821 1089-4918 |
| Published: |
2003
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa22606 |
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| Abstract: |
We show that the lowest nontrivial truncation of the two-particle irreducible (2PI) effective action correctly determines transport coefficients in a weak coupling or 1/N expansion at leading (logarithmic) order in several relativistic field theories. In particular, we consider a single real scalar field with cubic and quartic interactions in the loop expansion, the O(N) model in the 2PI-1/N expansion, and QED with a single and many fermion fields. Therefore, these truncations will provide a correct description, to leading (logarithmic) order, of the long time behavior of these systems, i.e. the approach to equilibrium. This supports the promising results obtained for the dynamics of quantum fields out of equilibrium using 2PI effective action techniques. |
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| Item Description: |
@articleAarts:2003bk, author = "Aarts, Gert and Martinez Resco, Jose M.", title = "Transport coefficients from the 2PI effective action", journal = "Phys.Rev.", volume = "D68", pages = "085009", doi = "10.1103/PhysRevD.68.085009", year = "2003", eprint = "hep-ph/0303216", archivePrefix = "arXiv", primaryClass = "hep-ph", SLACcitation = "%%CITATION = HEP-PH/0303216;%%", |
| College: |
Faculty of Science and Engineering |
| Issue: |
8 |
| Start Page: |
085009 |