Department of Mathematics,
University of California San Diego
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Informal Seminar on Mathematics and Biochemistry-Biophysics
Ms. Shenshen Wang
Department of Physics and Center for Theoretical Biological Physics, UCSD
Effective Temperature and Spontaneous Collective Motion of Active Matter
Abstract:
Spontaneous directed motion, a hallmark of cell biology, is unusual in classical statistical physics. Here we study, using both numerical and analytical methods, organized motion in models of the cytoskeleton in which constituents are driven by energy-consuming motors. Although systems driven by small-step motors are described by an effective temperature and are thus quiescent, at higher order in step size, both homogeneous and inhomogeneous, flowing and oscillating behavior emerges. Motors that respond with a negative susceptibility to imposed forces lead to an apparent negative temperature system in which beautiful structures form resembling the asters seen in cell division.
Hosts: Li-Tien Cheng and Bo Li
March 15, 2012
2:00 PM
AP&M 5829
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