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Abstract
Dynamical invariants and statistical properties of the quantized electromagnetic field
in nonstationary linear media (dielectric and/or conductive) are considered in the
framework of Choi-Yeon quantization scheme. It is shown that in the eigenstates of
linear dynamical invariant the Robertson-Schrodinger uncertainty relation is minimized,
both for the photon annihilation operator quadratures and for the electric and magnetic
field components. The time evolution of initial Glauber coherent states and Fock (photon
number) states is considered. On an initial coherent state the medium conductivity
and the time-dependent electric permeability both are shown to act as squeezing and
correlating factors.