Quantum statistics of radiation in thermostat

The influence of thermal noise on subpoisson statistics of the one-mode field is researched. The equilibrium distribution of subpoisson states is shown to have some subpoisson properties. The subpoisson effect in the evolution of the superposition of coherent signal and thermal noise depends on the field frequency, temperafure and initial signal amplitude.The present paper is dedicated to the memory of Prof. Marian Gmitro, a well-known specialist in nuclear physics untimely passed away. Being a man of great learning, in recent years he displayed an increased interest in achievements of quantum optics, and in particular, in their possible application to nuclear physics problems.Dedicated to the memory of M. Gmitro.