Squeezing is the basic (usually) two-photon deformation of the Gaussian stateGaussian quantum information. C. Weedbrook, S. Pirandola, R. García-Patrón, N. J. Cerf, T. C. Ralph, J. H. Shapiro and S. Lloyd in Rev. Mod. Phys. 84:621 (2012). into a quantum state that generalizes the coherent state of quantum mechanics and quantum optics.