Squeezing the Most out of Photons
Optics & Photonics Focus
Volume 4 Story 5 - 16/3/2009

Over-squeezing

After a certain point, the squeezing does not improve the measurement anymore, but the opposite happens and more squeezing results in an increased uncertainty. The orange area on the surface of the sphere represents the polarization of the three-photon state. If the uncertainty for the polarization in one direction is squeezed hard, the uncertainty in the other direction wraps around the sphere. Image Credit: Krister Shalm.
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Over-squeezing. After a certain point, the squeezing does not improve the measurement anymore, but the opposite happens and more squeezing results in an increased uncertainty. The orange area on the surface of the sphere represents the polarization of the three-photon state. If the uncertainty for the polarization in one direction is squeezed hard, the uncertainty in the other direction wraps around the sphere.