On the predictive power of Local Scale Invariance

Details On the predictive power of Local Scale Invariance On the predictive power of Local Scale Invariance

2008-07-04

arxiv.org/abs/0807.0753v1

J. Stat. Mech. (2008) P07026

Physics

Condensed Matter

Statistical Mechanics

17 pages, 2 eps figures

Scientific paper

10.1088/1742-5468/2008/07/P07026

Local Scale Invariance (LSI) is a theory for anisotropic critical phenomena designed in the spirit of conformal invariance. For a given representation of its generators it makes non-trivial predictions about the form of universal scaling functions. In the past decade several representations have been identified and the corresponding predictions were confirmed for various anisotropic critical systems. Such tests are usually based on a comparison of two-point quantities such as autocorrelation and response functions. The present work highlights a potential problem of the theory in the sense that it may predict any type of two-point function. More specifically, it is argued that for a given two-point correlator it is possible to construct a representation of the generators which exactly reproduces this particular correlator. This observation calls for a critical examination of the predictive content of the theory.

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