Physics – Quantum Physics
Scientific paper
1998-09-23
Acta Phys.Polon. B29 (1998) 3569-3590
Physics
Quantum Physics
Presented at the XXXVIII Cracow School of Theoretical Physics, Zakopane, June 1-10, 1998. To be published in Acta Physica Polo
Scientific paper
This article contains a review of an alternative theory of squeezing, based entirely on the wave function description of the squeezed states. Quantum field theoretic approach is used to describe the squeezing of the electromagnetic field in its most complete form that takes into account temporal and spatial characteristics of the squeezed state. An analog of the Wigner function for the full electromagnetic field is introduced and expressed in terms of second order correlation functions. The field-theoretic approach enables one to study the propagation of the ``squeezing wave'' in space-time. A simple example of weak squeezing, that allows for all calculations to be done analytically, is discussed in detail.
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