Investigation Of Quantum Properties Of Output Radiation From Single-mode Subharmonic Generator

In this project we studied the squeezing as well as the statistical properties of thernoutput light produced by single-mode subharmonic generating system coupled to vacuumrnreservoir. We obtained the c-number Langevin equations employing the master equationrnfor the system under consideration. Applying the solutions of these equations, we determinedrnthe anti-normally ordered characteristic function which enables us to obtain the Qrnfunction. Using the Q function, we have obtained the mean and variance of the photonrnnumber and photon number distribution for cavity mode. Moreover, with the aid of thernsolutions of c-number Langevin equations and input-output relation, we obtain the meanrnphoton number, power spectrum, quadrature variance and quadrature squeezing for thernoutput mode. Finally, for cavity and output mode we found that squeezing occurs inrnthe plus quadrature. In addition, when single-mode subharmonic generator is coupled tornvacuum reservoir, the output light generated by the system is in squeezed state and wernfound that there is 40% squeezing of the output light and 50% squeezing of the cavityrnlight below the vacuum level at steady state and threshold.

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