Superposition of Laser Light Beams Coupled to Vacuum Reservoir

Menisha Alemu, Fesseha Kassahuna

Menisha Alemu, Fekadu Tolessa Maremi, Beyene Bashu +1 more

Sitotaw Eshete

The squeezing and statistical properties of a pair of superposed non-degenerate three-level lasers coupled to a squeezed vacuum reservoir could be analyzed with the help of the density operator for a pair of superposed twomode laser light.We have determined the quadrature variances of the cavity modes.The results show that the light produced by the system under consideration is in squeezed state.According to our work, the quadrature squeezing for a pair of superposed laser light beams is found to be the average of the quadrature squeezing of the separate lasers.The presence of squeezed vacuum reservoir enhances the quadrature squeezing significantly.

Lorenzo M. Narducci, Eduardo Jaime Quel, Jorge R. Tredicce

Birke Alemu, Chimdessa Gashu Feyisa, Ebisa Mosisa +1 more

In this paper, the quantum properties of the cavity light beam produced by a coherently driven nondegenerate three-level laser with an open cavity and coupled to a two-mode thermal reservoir are thoroughly analyzed. We have carried out our analysis by putting the noise operators associated with the thermal reservoir in normal order. Here we discussed more the effect of thermal light and the spontaneous emission on the dynamics of the quantum processes. It is found that the maximum degree of intracavity squeezing 43% below the vacuum-state level. Moreover, the presence of thermal light leads to decrease the degree of entanglement.