8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

P8.38Thu 811:10-14:00Theoretical study of aging and instantaneousquenchings in attractive Yukawa systemsPedro Ramírez-González 11 Universidad Autonoma de San Luis Potosi, álvaro Obregón 64, 78000, San Luis Potosi,MexicoIn this work we demonstrate that the recently-developed non-equilibrium self-consistent generalizedLangevin equation (NE-SCGLE) theory [1, 2, 3] provides a theoretical description of the timeevolution of the static structure factor S(k; tw) and the time-dependent intermediate scatteringfunction F(k,τ; tw). We apply this theory to a model mono-component fluid of particlesinteracting through the hard-sphere plus short-ranged attractive Yukawa potential, subjected toan instantaneous quench to a temperature below its attractive glass transition. In the simplestidealized quench experiment, at the time tw = 0 the temperature of the system is instantaneouslyand discontinuously changed to a value T(f). After the sudden temperature change at tw = 0has occurred the system evolves spontaneously, searching for its new thermodynamic equilibriumstate, at which the static structure factor should be Seq(k; T(f)). If the end state, however,is a dynamically-arrested state (a glass or a gel), the system may never be able to reach thisequilibrium state within experimental times.[1] P. E. Ramírez-González and M. Medina-Noyola, Phys. Rev. E 82, 061503 (2010).[2] P. E. Ramírez-González and M. Medina-Noyola, Phys. Rev. E 82, 061504 (2010).[3] P. E. Ramírez-González PHD Thesis (2010).38