Renormalization group and nonequilibrium action in stochastic field theory.

We investigate the renormalization group approach to nonequilibrium field theory. We show that it is possible to derive nontrivial renormalization group flow from iterative coarse graining of a closed-time-path action. This renormalization group is different from the usual in quantum field theory textbooks, in that it describes nontrivial noise and dissipation. We work out a specific example where the variation of the closed-time-path action leads to the so-called Kardar-Parisi-Zhang equation, and show that the renormalization group obtained by coarse graining this action, agrees with the dynamical renormalization group derived by directly coarse graining the equations of motion.

• Publication year

  2002

• Venue

  Physical review. E, Statistical, nonlinear, and soft matter physics

• Publication date

  2002-03-27

• Fields of study

  Medicine, Physics

• Identifiers
  DOI 10.1103/PhysRevE.66.036134arXiv cond-mat/0203566PMID 12366211
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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