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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2235

Title: Strong disorder fixed point in absorbing-state phase transitions
Authors: HOOYBERGHS, Jef
Igloi, F
VANDERZANDE, Carlo
Issue Date: 2003
Publisher: AMERICAN PHYSICAL SOC
Citation: PHYSICAL REVIEW LETTERS, 90(10)
Abstract: The effect of quenched disorder on nonequilibrium phase transitions in the directed percolation universality class is studied by a strong disorder renormalization group approach and by density matrix renormalization group calculations. We show that for sufficiently strong disorder the critical behavior is controlled by a strong disorder fixed point and in one dimension the critical exponents are conjectured to be exact: beta = (3-root5)/2 and nu(perpendicular to) = 2. For disorder strengths outside the attractive region of this fixed point, disorder dependent critical exponents are detected. Existing numerical results in two dimensions can be interpreted within a similar scenario.
Notes: Limburgs Univ Centrum, Dept WNI, B-3590 Diepenbeek, Belgium. Vaste Stof Fys & Magnetisme Lab, B-3001 Heverlee, Belgium. Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary. Univ Szeged, Inst Theoret Phys, H-6720 Szeged, Hungary. Inst Theoret Fys, B-3001 Heverlee, Belgium.Hooyberghs, J, Limburgs Univ Centrum, Dept WNI, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/2235
DOI: 10.1103/PhysRevLett.90.100601
ISI #: 000181597500005
ISSN: 0031-9007
Category: A1
Type: Journal Contribution
Validation: ecoom, 2004
Appears in Collections: Research publications

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