Entangled Field States in the Process of Nondegenerate Parametric Decay in an Optical Cavity
S. T. Gevorgyan, M. S. Gevorgyan · Journal of Contemporary Physics (Armenian Academy of Sciences) · 2023
Abstract For the process of non-degenerate parametric decay in an optical cavity, where a photon with energy ћω3 decays into two photons with energies ћω2 and ћω1, where ћω3 = ћω2 + ћω1, the possibility of formation of entangled field states in terms of photon number variables between interacting modes of the optical system is investigated. Strong entangled states are shown between the modes with frequencies ω2 and ω1 in the case of strong coupling between interacting modes. In the case of weak and very strong coupling between these modes, relatively weak entangled states are formed. In the case of weak coupling, these modes are localized in entangled vacuum states with low values of quantum entropy. For modes with frequencies ω3 and ω1etangled states are formed only in the case of strong coupling.