The following are images and movies of the "squeezed" triphotons we produce and measure.  From the press release: "In all previous work, it was assumed that one could squeeze indefinitely, simply tolerating the growth of uncertainty in the uninteresting direction.   But the world of polarization, like the Earth, is not flat.

A state of polarization can be thought of as a small continent floating on a sphere.  When we squeezed our triphoton continent, at first all proceeded as in earlier experiments.  But when we squeezed sufficiently hard, the continent lengthened so much that it began to "wrap around" the surface of the sphere.

To take the metaphor further, all previous experiments were confined to such small areas that the sphere, like your home town, looked as though it was flat.  This work needed to map the triphoton on a globe, which we represented on a sphere providing an intuitive and easily applicable visualization.  In so doing, we showed for the first time that the spherical nature of polarization creates qualitatively different states and places a limit on how much squeezing is possible"