Dynamic critical phenomena from spectral functions on the lattice
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Publication:622669
DOI10.1016/J.NUCLPHYSB.2010.02.007zbMATH Open1204.82016arXiv0912.3135OpenAlexW2002233243MaRDI QIDQ622669
Author name not available (Why is that?)
Publication date: 3 February 2011
Published in: (Search for Journal in Brave)
Abstract: We investigate spectral functions in the vicinity of the critical temperature of a second-order phase transition. Since critical phenomena in quantum field theories are governed by classical dynamics, universal properties can be computed using real-time lattice simulations. For the example of a relativistic single-component scalar field theory in 2+1 dimensions, we compute the spectral function described by universal scaling functions and extract the dynamic critical exponent z. Together with exactly known static properties of this theory, we obtain a verification from first principles that the relativistic theory is well described by the dynamic universality class of relaxational models with conserved density (Model C).
Full work available at URL: https://arxiv.org/abs/0912.3135
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