Alex Watson

Duke


Wave-packet dynamics in locally periodic media


Mathematical Physics Seminar


17th May 2019, 2:00 pm – 3:00 pm
Howard House, 4th Floor Seminar Room


We study the dynamics of wave-packet solutions of Schr\”{o}dinger’s equation and Maxwell’s equations in media with a local periodic structure which varies adiabatically (over many periods of the periodic lattice) across the medium. We focus in particular on the case where symmetries of the periodic structure lead to degeneracies in the Bloch band dispersion surface. We derive systematically and rigorously the `anomalous velocity’ of wave-packets due to the Bloch band’s Berry curvature, and the dynamics of a wave-packet incident on a Bloch band degeneracy in one spatial dimension. Joint work with Michael Weinstein and Jianfeng Lu.





Organiser: Nick Jones

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