INFLUENCE OF THE VIRTUAL PHOTON FIELD ON THE ATOMIC QUANTUM CHARACTER IN TWO-MODE SQUEEZING VACUUM FIELD

We have investigated in the time-evolution and the squeezing character of atomic operators in a system of two-mode squeezed vacuum field interacting with a two-level atom without the rotating-wave approximation by means of quantum theory.The results obtained using the numerical method indicate that the influence of the virtual-photon field on the atomic quantum character is mainly the cause for quantum chaos which is related to the quantum character of the system itself.