INFORMATION-THEORETICAL ESTIMATION OF HIGHER-ORDER CORRELATION-FUNCTIONS OF THE ELECTROMAGNETIC-FIELD IN A CAVITY

Properties of a statistical ensemble of N modes of an electromagnetic field in a cavity are discussed within the framework of the informatio n-theoretical approach to statistical physics. Density operator maximi zing the Von Neumann entropy for the case that all first- and second-o rder correlation functions have to satisfy, and the conditions of the thermodynamical regularity, are determined. Finally, the characteristi c function corresponding to the estimated density operator is determin ed which allows for evaluating all higher-order correlations.