Voronov V. Quantum correlations and quantum noise in entangled states of quantum systems

In the dissertation a method for the disentangling of exponential noncommuting operator, based on the Baker-Campbell-Haussdorff formula is presented. The photon statistics and possibility of quantum noise reduction in the output of the Michelson interfefometer beamsplitter using squeezed light is studied. The dark port case of the interferometer is deeply studied. The generalized noise model for the description of polarization entangled twophoton states, emitted via the spontaneous parametric down-conversion process type II with the simultaneous presence of colored and white noise was proposed. The separability conditions for these states were obtained, and conditions for the entanglement identification.