Classically entangled light from a laser (IMAGE)
Caption
A simple laser comprising just two standard mirrors was used to create higher-dimensional classically entangled light, a new state of the art, deviating from the prevailing paradigm of two-dimensional Bell states. The approach combines internal generation, in-principle unlimited in what can be created, with external control, allowing user-defined states to be molded. Shown here are examples of two-dimensional Bell (left) and high-dimensional states (right), including the famous GHZ states.
Credit
by Yijie Shen, Isaac Nape, Xilin Yang, Xing Fu, Mali Gong, Darryl Naidoo and Andrew Forbes
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