dc.contributor.author	Afzal, Nasrin	en
dc.contributor.committeechair	Pleimling, Michel J.	en
dc.contributor.committeemember	Sharpe, Eric R.	en
dc.contributor.committeemember	Robinson, Hans D.	en
dc.contributor.committeemember	Khodaparast, Giti A.	en
dc.contributor.department	Physics	en
dc.date.accessioned	2013-10-17T15:19:38Z	en
dc.date.available	2013-10-17T15:19:38Z	en
dc.date.issued	2013-04-27	en
dc.description.abstract	Recent years have seen remarkable progress in our understanding of physical aging in nondisordered systems with slow, i.e. glassy-like dynamics. In many systems a single dynamical length L(t), that grows as a power-law of time t or, in much more complicated cases, as a logarithmic function of t, governs the dynamics out of equilibrium. In the aging or dynamical scaling regime, these systems are best characterized by two-times quantities, like dynamical correlation and response functions, that transform in a specific way under a dynamical scale transformation. The resulting dynamical scaling functions and the associated non-equilibrium exponents are often found to be universal and to depend only on some global features of the system under investigation. We discuss three different types of systems with simple and complex aging properties, namely reaction diffusion systems with a power growth law, driven diffusive systems with a logarithmic growth law, and a non-equilibrium polymer network that is supposed to capture important properties of the cytoskeleton of living cells. For the reaction diffusion systems, our study focuses on systems with reversible reaction diffusion and we study two-times functions in systems with power law growth. For the driven diffusive systems, we focus on the ABC model and a related domain model and measure two- times quantities in systems undergoing logarithmic growth. For the polymer network model, we explain in some detail its relationship with the cytoskeleton, an organelle that is responsible for the shape and locomotion of cells. Our study of this system sheds new light on the non- equilibrium relaxation properties of the cytoskeleton by investigating through a power law growth of a coarse grained length in our system.	en
dc.description.degree	Ph. D.	en
dc.format.medium	ETD	en
dc.identifier.other	vt_gsexam:637	en
dc.identifier.uri	http://hdl.handle.net/10919/23901	en
dc.publisher	Virginia Tech	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	Equilibrium and Non-Equilibrium Statistical Physics	en
dc.subject	Soft Matter	en
dc.subject	Polymer Physics	en
dc.subject	Aging in Biophysics	en
dc.subject	Driven Diffusive Systems	en
dc.title	Aging processes in complex systems	en
dc.type	Dissertation	en
thesis.degree.discipline	Physics	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	doctoral	en
thesis.degree.name	Ph. D.	en

Aging processes in complex systems

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