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arXiv · 1503.08824

Chiral Bogoliubons in Nonlinear Bosonic Systems

Charles-Edouard Bardyn·Torsten Karzig·Gil Refael·Timothy C. H. Liew
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Abstract

We present a versatile scheme for creating topological Bogoliubov excitations in weakly interacting bosonic systems. Our proposal relies on a background stationary field that consists of a Kagome vortex lattice, which breaks time-reversal symmetry and induces a periodic potential for Bogoliubov excitations. In analogy to the Haldane model, no external magnetic field or net flux is required. We construct a generic model based on the two-dimensional (2D) nonlinear Schrödinger equation and demonstrate the emergence of topological gaps crossed by chiral Bogoliubov edge modes. Our scheme can be realized in a wide variety of physical systems ranging from nonlinear optical systems to exciton-polariton condensates.

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Charles-Edouard Bardyn, Torsten Karzig, Gil Refael, Timothy C. H. Liew. 2015-03-30. Chiral Bogoliubons in Nonlinear Bosonic Systems. https://doi.org/10.1103/physrevb.93.020502

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