We present a field-theoretical description of the squeezed states of the electromagnetic field. A definition of the squeezed state is introduced that is a natural generalization of the definition for one or two modes. We show that the squeezing produced by the medium with space- and time-dependent material coefficients ∈ and µ is directly related to the photon-pair production. In Appendix A we describe the time evolution of the Gaussian squeezed states in terms of the field variables.
© 1987 Optical Society of America
Zofia Bialynicka-Birula and Iwo Bialynicki-Birula, "Space–time description of squeezing," J. Opt. Soc. Am. B 4, 1621-1626 (1987)