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Skyrmion gas manipulation for probabilistic computing

  • Datum: 24.04.2017
  • Uhrzeit: 11:00
  • Vortragender: Daniele Pinna
  • Ort: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle (Saale)
  • Raum: Seminarraum A.2.20
  • Gastgeber: Max-Planck-Institut für Mikrostrukturphysik

The topologically protected magnetic spin configurations known as skyrmions offer promising applications due to their stability, mobility and localization. In this work, we emphasize how to leverage the thermally driven dynamics of an ensemble of such particles to perform computing tasks. We propose a device employing a skyrmion gas to reshuffle a random signal into an uncorrelated copy of itself. This is demonstrated by modelling the ensemble dynamics in a collective coordinate approach where skyrmion-skyrmion and skyrmion-boundary interactions are accounted for phenomenologically. Our numerical results are used to develop of proof-of-concept for an energy efficient (~ μW) device with a low area imprint (~ μm2). Whereas its immediate application
to stochastic computing circuit designs will be made apparent, we argue that its basic functionality, reminiscent of an integrate-and-fire-neuron, qualifies it as a novel bio-inspired building block.

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