Seminars of the Focus Area Complex Systems

Prof. Dr. C. Beta, Prof. Dr. K. Dethloff, Prof. Dr. R. Engbert, Prof. Dr. M. Holschneider, Prof. Dr. W. Huisinga, Prof. Dr. Ralf Metzler, Prof. Dr. A. Pikovsky, Prof. Dr. S. Reich, Prof. Dr. M. Rosenblum, Prof. Dr. G. Rüdiger, Prof. Dr. T. Scheffer, Prof. Dr. F. Scherbaum, Prof. Dr. J. Selbig, Prof. Dr. F. Spahn

Seminar

Speaker: Sandalo Roldan-Vargas, MPI for the Physics of Complex Systems, Dresden, Germany

Title: Anomalies, Rare Events and Brownian Motion * Colloquium on Complex and Biological Systems

Time: Fri, Dec 8, 2017, 11:15am

Place: bldg 28, room 0.108

Abstract:
In his celebrated 1905 paper, Albert Einstein proposed for the first time a statistical interpretation of Robert Brown’s innocent observation based on the corpuscular constitution of matter. His theory suggested that the long time motion of a Brownian particle is diffusive whereas the probability distribution of the particle displacements is Gaussian. For more than one hundred years these predictions were systematically validated in real systems and the coexistence between Diffusivity and Gaussianity became a paradigm. However, recent experiments on mesoscopic particle systems have claimed the existence of a time regime where diffusion is not accompanied by a purely Gaussian distribution of displacements. In this talk I will discuss these recent observations as well as those minimal stochastic models proposed to rationalize the new intriguing experimental phenomenology. Using molecular dynamics simulations I will further discuss the emergence of the hypothetical diffusive yet non-Gaussian regime in glass and gel forming-liquids. I will conclude my talk by exploring the connection between non-Gaussian dynamics and system topology.

Bibliography
B. Wang, J. Kuo, S. C. Bae, and S. Granick, Nat. Mater. 11, 481 (2012).
M. V. Chubynsky and G. W. Slater, Phys. Rev. Lett. 113, 098302 (2014).
A. V. Chechkin, F. Seno, R. Metzler, and I. M. Sokolov, Phys. Rev. X 7, 021002 (2017).
L. Berthier and G. Biroli, Rev. Mod. Phys. 83, 587 (2011).
S. Roldan-Vargas, L. Rovigatti, and F. Sciortino, Soft Matter 13, 514 (2017).

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Past NLD Seminars (1994-2007) & (2008 ...)

Students' seminar: Theoretical Physics, PIK, Modeling & TSA Berlin-Potsdam-Colloquia: PhysGesellschaft Berlin, TU Berlin, Pro Physik, AIP, AEI, MPI-KGF, GFZ, HMI, PIK, AWI, Max Planck Institute for the History of Science, Mathematik, DPG Disputationen, & Vorschau UP

Udo Schwarz, Zentrum für Dynamik komplexer Systeme,
Universität Potsdam, Campus Golm Karl-Liebknecht-Str. 24, 14476 Potsdam, building 28, room 2.107
Phone: (+49-331) 977-1658, Fax : (+49-331) 977-1045

Email: Udo.Schwarz AT uni-potsdam.de

DFG SFB 1294

DFG Sonderforschungsbereich 1294 Data assimilation

DFG SPP 1488

DFG Schwerpunktprogramm 1488 Planetmag


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