Entropy of Optical Fields
Vlasta Peřinová, J. Křepelka, Jan Peřina, A. Lukš, Przemyslaw Szlachetka · Optica Acta International Journal of Optics · 1986
A systematic approach to the use of entropy as a measure of noise and order in quantum optical fields is developed. The general definition of entropy, adopting the density matrix, is expressed in terms of both the eigenvalues of this operator and the quasidistribution function related to antinormal ordering of the field operators. Special states of optical fields, such as the Fock state, the coherent state, the chaotic state, single-mode and multimode two-photon coherent states, squeezed states and the shifted gaussian state, including the time development under a particular interaction, are considered. The general conclusions reached are illustrated by numerical results.