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Critical Exponents of Strongly Correlated Fermion Systems from Diagrammatic Multiscale Methods.
- Source :
-
Physical Review Letters . 6/6/2014, Vol. 112 Issue 22, p226401-1-226401-5. 5p. - Publication Year :
- 2014
-
Abstract
- Self-consistent dynamical approximations for strongly correlated fermion systems are particularly successful in capturing the dynamical competition of local correlations. In these, the effect of spatially extended degrees of freedom is usually only taken into account in a mean field fashion or as a secondary effect. As a result, critical exponents associated with phase transitions have a mean field character. Here we demonstrate that diagrammatic multiscale methods anchored around local approximations are indeed capable of capturing the non-mean-field nature of the critical point of the lattice model encoded in a nonvanishing anomalous dimension and of correctly describing the transition to mean-field-like behavior as the number of spatial dimensions increases. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00319007
- Volume :
- 112
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- Physical Review Letters
- Publication Type :
- Academic Journal
- Accession number :
- 96807009
- Full Text :
- https://doi.org/10.1103/PhysRevLett.112.226401