## Blurring the classical-quantum divide

*Professor Andrew Forbes, University of the Witwatersrand, South Africa*

* This colloquium will be held at 12 noon, 1st December, in Steele 03-309*

Entanglement is a quintessential property of quantum systems, and captures the fact that the state may be written in a manner that is non-separable, so that a measurement on one affects the outcome of the other. But non-separability is not unique to quantum mechanics: weather maps are non-separable, and more pertinently, so are certain forms of structured classical light, controversially referred to as “classical entangled”. In this talk I will outline how these structured light beams can be created and how they can be used to blur the classical-quantum divide, demonstrating quantum tools applied to the classical world, and classical beams used in quantum processes.