We used equations (28) and (29) to evaluate experimentally the concurrence of classical and quantum states plotted in Fig. 3a and b. Measuring the non-separability of vector vortex modes.

Art critic Matt Collings explores the most famous equations in science and realises that concepts of beauty and elegance have been used by many scientists to advance their work. Show more Artist ...

If you hang around with physics people long enough, some­one eventually will bring up Maxwell's equations. Maybe as part of a joke, or on a T-shirt or a tattoo. But they'll be somewhere. So even ...