Infinite-noise criticality: Nonequilibrium phase transitions in fluctuating environments

Autor(es)

Vojta, Thomas ^[1] ; Hoyos, Jose A. ^[2]

Afiliação do(s) autor(es)

^[1] Missouri Univ Sci & Technol, Dept Phys, Rolla, MO 65409 - USA

^[2] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EPL; v. 112, n. 3 NOV 2015.
• Citações Web of Science: 18

Resumo

We study the effects of time-varying environmental noise on nonequilibrium phase transitions in spreading and growth processes. Using the examples of the logistic evolution equation as well as the contact process, we show that such temporal disorder gives rise to a distinct type of critical points at which the effective noise amplitude diverges on long time scales. This leads to enormous density fluctuations characterized by an infinitely broad probability distribution at criticality. We develop a real-time renormalization-group theory that provides a general framework for the effects of temporal disorder on nonequilibrium processes. We also discuss how general this exotic critical behavior is, we illustrate the results by computer simulations, and we touch upon experimental applications of our theory. Copyright (C) EPLA, 2015 (AU)

• Processo FAPESP: 13/09850-7 - Disorder, Dynamics, Frustration and Topology in Quantum Condensed Matter
• Beneficiário: José Abel Hoyos Neto
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior