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SeminarPast EventPhysics of Life

Nonequilibrium self-assembly and time-irreversibility in living systems

Gili Bisker

Tel Aviv University

Schedule
Friday, November 5, 2021

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Schedule

Friday, November 5, 2021

12:00 PM Europe/London

Host: Imperial College Physics of Life Network Seminars

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Event Information

Domain

Physics of Life

Original Event

View source

Host

Imperial College Physics of Life Network Seminars

Duration

70 minutes

Abstract

Far-from-equilibrium processes constantly dissipate energy while converting a free-energy source to another form of energy. Living systems, for example, rely on an orchestra of molecular motors that consume chemical fuel to produce mechanical work. In this talk, I will describe two features of life, namely, time-irreversibility, and nonequilibrium self-assembly. Time irreversibility is the hallmark of nonequilibrium dissipative processes. Detecting dissipation is essential for our basic understanding of the underlying physical mechanism, however, it remains a challenge in the absence of observable directed motion, flows, or fluxes. Additional difficulty arises in complex systems where many internal degrees of freedom are inaccessible to an external observer. I will introduce a novel approach to detect time irreversibility and estimate the entropy production from time-series measurements, even in the absence of observable currents. This method can be implemented in scenarios where only partial information is available and thus provides a new tool for studying nonequilibrium phenomena. Further, I will explore the added benefits achieved by nonequilibrium driving for self-assembly, identify distinctive collective phenomena that emerge in a nonequilibrium self-assembly setting, and demonstrate the interplay between the assembly speed, kinetic stability, and relative population of dynamical attractors.

Topics

chemical fueldirected motiondissipative processesdynamical attractorsentropy productionkinetic stabilitymolecular motorsnonequilibrium self-assemblyphysics of lifetime-irreversibility

About the Speaker

Gili Bisker

Tel Aviv University

Contact & Resources

No additional contact information available

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