糖心TV Complexity Science Events
Complexity Centre and MathSys CDT events carry priority over room D1.07.
To book D1.07 please email Sheetal dot Sharma at warwick dot ac dot uk
Please note that your event booking is for D1.07 only. The adjacent common room is a private area for the MathSys Centre that cannot used as part of your booking.
Complexity Forum- Jerry Gollub
Title: Reversibility, Chaos, and Self-Organization
Abstract:
Both reversible and irreversible systems are common in physical and mathematical systems. Many interesting examples have nothing to do with thermodynamics. In some cases reversibility is a consequence of the underlying equations of motion, as in the famous fluid demonstration popularized by Sir G.I. Taylor. However, if the fluid contains particles, then it is not obvious whether reversibility will persist, due to chaotic interactions among the particles. However, a self-organized state that suppresses chaos can arise as a kind of non-equilibrium phase transition, complete with a critical point and the divergences that characterize thermodynamic phase transitions. The experimental discovery, and efforts to understand this special dynamical state in which chaos suppresses chaos, will be presented. It can be understood mathematically in one dimension, and numerically in 2D or 3D. Other examples of irreversible behavior in nonlinear dynamics, typically without a phase transition, will be discussed as time allows.
(Work done with L. Corté, D.J. Pine, P. Chaikin, J. Brady, and A. Leshansky. It has appeared in Nature, and in Nature Physics. )