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Special CAMP Seminar: Photonic analogues of topological superconductors

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Aashish Clerk, University of Chicago, and McGill University
11 October 2017 from 3:30 PM to 4:30 PM
318 Osmond Laboratory
Contact Name
Mikael Rechtsman
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Interest continues to grow in photonic analogues of topological electronic phases.  In most cases, these systems are non-interacting, and have the same band structure and edge state structure as their fermionic counterparts.  In this talk, I’ll discuss recent theory work in my group showing how parametric “two-photon” driving can be used to realize a new class of photonic topological systems that superficially resemble topological superconductors.  Unlike standard particle-number conserving models of non-interacting topological phases, these new systems exhibit crucial differences between their bosonic and fermionic versions.  Further, one can realize a situation where all bulk states are stable, but where edge states are guaranteed to be unstable.  Such a system can form the basis of a useful device:  a topologically-protected amplifier which operates close to the fundamental limits set by quantum mechanics.  I’ll discuss how these ideas could be realized in a variety of different experimental platforms, including superconducting quantum circuits and optomechanics.