Kassahun, Fesseha (PhD)Ayele, Mesfin2018-06-292023-11-092018-06-292023-11-092012-06http://10.90.10.223:4000/handle/123456789/5000Employing c-number Langevin equations and taking into considerations the correlation properties of the noise forces, we obtained the antinormally-ordered characteristic func- tion, and with the aid of this result, we have determined the Q-function for a two- mode cavity light. Upon the pertinent Q-function, we have calculated the mean and the normally-ordered variance of the photon numbers sum and di erence, the quadrature variance, the photon number correlation and the quadrature squeezingenTwo-Mode CoherentThesis