BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:UW-Madison-Physics-Events BEGIN:VEVENT SEQUENCE:2 UID:UW-Physics-Event-4804 DTSTART:20180412T150000Z DURATION:PT1H0M0S DTSTAMP:20260408T034054Z LAST-MODIFIED:20180410T154605Z LOCATION:5310 Chamberlin SUMMARY:Photonic analogues of topological superconductors \, R. G. He rb Condensed Matter Seminar\, Aashish Clerk\, McGill University DESCRIPTION:
\nInterest continues to grow in photonic and phononic analogues of topological electronic phases. In most cases\, these sy stems are non-interacting\, and have the same band structure and edge state structure as their fermionic counterparts. In this talk\, I’l l discuss recent theory work in my group showing how parametric “two -photon” driving can be used to realize a new class of photonic topo logical systems that superficially resemble topological superconductor s. Unlike standard particle-number conserving models of non-interacti ng topological phases\, these new systems exhibit crucial differences between their bosonic and fermionic versions. Further\, one can reali ze a situation where all bulk states are stable\, but where edge state s are guaranteed to be unstable. Such a system can form the basis of a useful device: a topologically-protected amplifier which operates cl ose to the fundamental limits set by quantum mechanics. I’ll discus s how these ideas could be realized in a variety of different experime ntal platforms\, including superconducting quantum circuits and optome chanics. URL:https://www.physics.wisc.edu/events/?id=4804 END:VEVENT END:VCALENDAR