BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Work and Power in Active and Sheared Systems\, respectively - Timo
 thy Ekeh\, DAMTP
DTSTART:20210126T130000Z
DTEND:20210126T140000Z
UID:TALK156052@talks.cam.ac.uk
CONTACT:Patrick Pietzonka
DESCRIPTION:Zoom link: https://maths-cam-ac-uk.zoom.us/j/94018037756\n\nTh
 ermodynamic cycles with active matter: Active Brownian Particles (ABPs) ca
 n be used as a working fluid for a cyclically driven heat engine. This lea
 ds to protocols with features that can not be mimicked by equilibrium syst
 ems. Such protocols are "boundary driven"\, in the sense that work can be 
 extracted by only tweaking the details of the confining trap\, even at a s
 ingle reservoir temperature. We will discuss a procedure for optimising th
 ese protocols\, as well as present a generic relation bounding the fluctua
 tions in the output power. [1]\n   \nPower fluctuations in elastoplastic m
 odels: Elastoplastic models (EPMs) are simple theoretical constructions us
 ed to capture key aspects of a material's response under loading. Despite 
 their simplicity\, they have been used to capture an array of real-world p
 henomenology\, such as shear-banding and the yielding transition. A simula
 tion study by Rabhari et al [2] investigated the fluctuations in the "loca
 l power injection" for a sheared system\, and found that the character of 
 rare fluctuations in this quantity changed dramatically across the jamming
  transition. In this talk\, we show that a similar crossover in fluctuatio
 n behaviour can be seen within a variant of the foundational Hebraud-Leque
 x model.\n\n\n[1] Phys. Rev. E *102*\, 010101R (2020)\, https://journals.a
 ps.org/pre/abstract/10.1103/PhysRevE.102.010101\n\n[2] Nat. Commun. *8*\, 
 11 (2017)\, https://www.nature.com/articles/s41467-017-00022-8
LOCATION:via zoom\, meeting ID 940-1803-7756
END:VEVENT
END:VCALENDAR