Quantum Matter Seminar - Aashish Clerk (University of Chicago) Bosonic Analogues of Topological Superconductors

September 13, 2018
Monday, September 17, 2018 - 11:30am to 12:30pm
1080 Physics Research Building - Smith Seminar Room
Aashish Clerk (University of Chicago) 9/17/18 Quantum Matter Seminar speaker

Interest continues to grow in photonic and phononic analogues of topological electronic phases. These systems are typically 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 on a class of bosonic systems where this correspondence fails.  They involve using parametric “two-photon” driving, and have Hamiltonians that superficially resemble those of topological superconductors.  Among the surprising effects that emerge are the presence of topologically-protected instabilities that can be harnessed for non-reciprocal quantum amplification, and effective non-Hermitian dynamics in a bosonic analogue of the Kitaev-Majorana chain.   I’ll discuss how these ideas could be realized in a variety of different experimental platforms, including superconducting quantum circuits and optomechanics.

 

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