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SUMMARY:Collective Phenomena in lattices of nanoelectromechanical oscillat
 ors - Dr Matt Matheny\, Caltech
DTSTART:20190628T150000Z
DTEND:20190628T160000Z
UID:TALK127126@talks.cam.ac.uk
CONTACT:Ashwin Seshia
DESCRIPTION:Understanding the macroscopic behavior of networks of coupled 
 oscillators from their microscopic properties has fundamental value to man
 y areas of science. The most basic phenomena observed is synchronization\,
  when the phases or frequencies of oscillators become ordered as coupling 
 becomes large [1]. A parallel can be drawn between this ordering and ferro
 magnetism/antiferromagnetism in condensed matter systems. Carrying the con
 nection between coupled oscillators and condensed matter further\, collect
 ive modes which spontaneously break lattice symmetry become stable when on
  site and interaction terms are appropriately tuned. Here\, I show these s
 tates are experimentally accessible in a chain of nanoelectromechanical os
 cillators with periodic boundary conditions. Through full control over ind
 ividual oscillator parameters in situ [2]\, I demonstrate control over mac
 roscopic state properties and spontaneously symmetry breaking [3].\n\n[1] 
 Matheny\, M.H. \, Grau\, M.\, Villanueva\, L.G.\, Karabalin\, R.B.\, Cross
 \, M.C.\, and Roukes\, M.L. (2014). Phase Synchronization of Two Anharmoni
 c Nanomechanical Oscillators. Phys. Rev. Lett. 112\, 014101.\n[2] Fon\, W.
 \, Matheny\, M.H.\, Li\, J.\, Krayzman\, L.\, Cross\, M.C.\, D’Souza\, R
 .M.\, Crutchfield\, J.P. and Roukes\, M.L (2017). Complex dynamical networ
 ks constructed with fully controllable nonlinear nanomechanical oscillator
 s. Nano letters\, 17(10)\, 5977-5983.\n[3] Matheny\, M. H.\, Emenheiser\, 
 J.\, Fon\, W.\, Chapman\, A.\, Rohden\, M. \, Salova\, A. Li\, J. de Badyn
 \, M. H.\, Duenas-Osorio\, L.\, Mesbahi\, M. Crutchfield\, J. P.\, Cross\,
  M. C.\, D'Souza\, R. M. and Roukes\, M. L. (2019). Exotic states in a sim
 ple network of nanoelectromechanical oscillators. Science\, 363(6431)\, ea
 av7932.\n
LOCATION:Electrical Engineering\, Department of Engineering - Ground floor
  Seminar Room - 9 JJ Thomson Avenue\, Cambridge\, CB3 0FA
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