Control of photon-number correlations in squeezed vector optical solitons

Abstract

Continuous-variable optical quantum entanglement and correlations play an essential role in various quantum applications, such as quantum communications, quantum computation, and quantum imaging. In current study a new approach for generating squeezed quantum-correlated pulse pairs is proposed. The pulse propagation in a birefringent fiber is considered. The photon-number correlations and squeezing are studied using linearized quantum fluctuation theory. The correlated pulse pairs can be generated by splitting a second-order soliton or by inelastic collision of two fundamental solitons. The splitting of the second-order soliton produces two orthogonally polarized pulses propagation with different group velocities. The interpulse correlations of quantum noise depends on the overlapping of their spectra. With the nonoverlapping spectra, the correlations disappeared. The interpulse correlations depends on the interplay between polarization mode dispersion and polarization instability. Another approach to producing correlated pulse pairs is based on the inelastic collision of two solitons. The inelastic interaction can be forced using a dispersion oscillating birefringent fiber. The photon-number correlations arise at the moment of pulse collision and are maintained during further propagation. Correlations and squeezing can be controlled by the adjustments of the relative phase delay of the input pulses. The quantum correlations in the pulse pairs with orthogonal polarization states are considered. The orthogonally polarized pulses can be separated into two different channels using a polarization beam splitter.

Speaker

Andrey Konyukhov
Saratov State University
Russia

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