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SUMMARY:Emergent Many-body Interactions in Amorphous Solids - Yoav Pollack
 \, The Weizmann Institute of Science
DTSTART:20170906T100000Z
DTEND:20170906T110000Z
UID:TALK79251@talks.cam.ac.uk
CONTACT:Vanessa Blake
DESCRIPTION:Inter-particle forces in amorphous solids such as glasses\, co
 lloids and granular material can be used\nto study jamming\, force-chains[
 1] and other non-equilibrium phenomena. In thermal materials where\nnevert
 heless the mean positions are well defined on a given time-scale\, effecti
 ve inter-particle forces\nkeep the particles "in place". If one could dedu
 ce the related effective force-laws and therefore the\npotential and Hessi
 an\, the analysis of these material would be greatly simplified by the usa
 ge of tools\nhitherto reserved for a-thermal systems. Initial characteriza
 tion of the effective forces was recently\nperformed in simulation[2]. Qui
 te remarkably an emergence of effective many-body interactions is\nobserve
 d\, even when the bare interactions are purely 2-body. The many-body natur
 e of the effective\nforce-laws also resolves the puzzle posed by recent st
 udies[3] that showed a quantitative match\nbetween 2D/3D measurements and 
 the infinite dimension hard spheres mean-field prediction[4].\n\n[1] See c
 over of Phys. Rev. Lett. 116 Issue 7.\n[2] O. Gendelman\, E. Lerner\, Y.G.
  Pollack\, I. Procaccia\, C. Rainone and B. Riechers\, Phys. Rev. E 94\, 0
 51001(R) (2016).\n[3] For example: P. Charbonneau\, J. Kurchan \, G. Paris
 i\, P. Urbani and F. Zamponi\, Ann. Rev. Cond. Matt. Phys. 8 265-288\n(201
 7).\n[4] G. Parisi\, Y.G. Pollack\, I. Procaccia\, C. Rainone and M. Singh
 \, In preparation.
LOCATION:Lecture Theatre 1\, Department of Chemical Engineering and Biotec
 hnology\, West Cambridge Site
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