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## Open Access item Temporal Griffiths Phases

Authors:

Issue Date:2011
Publisher:American Physical Society
Citation:Physical Review Letters 106: 235702 (2011)
Abstract:Disorder is an unavoidable ingredient of real systems. Spatial disorder generates {\it Griffiths phases} (GPs) which, in analogy to critical points, are characterized by a slow relaxation of the order parameter and divergences of quantities such as the susceptibility. However, these singularities appear in an extended region of the parameter space and not just at a (critical) point, i.e. there is {\it generic scale invariance}. Here, we study the effects of temporal disorder, focusing on systems with absorbing states. We show that for dimensions $d \geq 2$ there are {\it Temporal Griffiths phases (TGPs)} characterized by generic power-law spatial scaling and generic divergences of the susceptibility. TGPs turn out to be a counterpart of GPs, but with space and time playing reversed roles. TGPs constitute a unifying concept, shedding light on the non-trivial effects of temporal disorder.
Description:PACS numbers: 05.40.Ca,05.10.Gg,05.70.Fh,05.70.J
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevLett.106.235702
URI:http://hdl.handle.net/10261/44597
ISSN:0031-9007