Abstract

The goal is to entangle states associated with distinct topological sectors, and to do so in a way that allows this entangled topology to be readily available for information processing and detection. Specifically, linear optics will be used to produce: (i) winding-number-entangled bulk states, and (ii) an entangled pair of error-protected memory registers. To create the states, a source of initial polarization-entangled light is necessary, specifically type-II spontaneous parametric down conversion (SPDC) in a nonlinear crystal. All further processing requires only linear optical elements. Topological invariants characterize global properties of systems and cannot be easily distinguished by localized measurements.

© 2019 IEEE