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SIAM Chapter Seminar

Matthew Daniels
Carnegie Melllon University
Title: From Spins to Skyrmions: Dynamics of Topological Magnetization States

Abstract: Understanding and control of quantum spins is critical for modern science and technology. Spins are a prototypical example of nonclassicality in quantum mechanics, and have represented interesting theoretical challenges from the early 20th century to this day. Meanwhile, they have been the foundation of many hard drive technologies since their inception. In this talk, I will motivate the study of spins at a semiclassical level, with an emphasis on skyrmions, a particular kind of nontrivial magnetic ground states belonging to a nontrivial homotopy class. We will explore the interactions of skyrmions with low lying fluctuations in magnetic systems, analyze their dynamics and interactions through the SO(3) nonlinear sigma model, and discuss possible applications and device concepts for these topologically protected configurations.

Date: Thursday, November 19, 2015
Time: 5:30 pm
Location: Wean Hall 8220
Submitted by:  Samuel Cohn