# Dynamically manipulating topological physics and edge modes in a single degenerate optical cavity. (arXiv:1703.05924v1 [quant-ph])

degenerate cavity, whose modes are mapped to lattice sites. A crucial

ingredient of the scheme is to construct a sharp boundary so that the open

boundary condition can be implemented for this effective lattice system. In

doing so, the topological properties of the system can manifest themselves on

the edge states, which can be probed from the spectrum of an output cavity

field. We demonstrate this with two examples: a static Su-Schrieffer-Heeger

chain and a periodically driven Floquet topological insulator. Our work opens

up new avenues to explore exotic photonic topological phases inside a single

optical cavity.