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R. G. Herb Condensed Matter Seminars

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Events During the Week of April 8th through April 15th, 2018

Monday, April 9th, 2018

No events scheduled

Tuesday, April 10th, 2018

No events scheduled

Wednesday, April 11th, 2018

No events scheduled

Thursday, April 12th, 2018

Photonic analogues of topological superconductors
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Aashish Clerk, McGill University
Abstract:
Interest continues to grow in photonic and phononic 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.
Host: Vavilov
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Friday, April 13th, 2018

No events scheduled
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