On Preparing Entangled Pairs of Polarization Qubits in the Frequency Non-Degenerate Regime

Details On Preparing Entangled Pairs of Polarization Qubits in the Frequency Non-Degenerate Regime On Preparing Entangled Pairs of Polarization Qubits in the Frequency Non-Degenerate Regime

2010-08-31

arxiv.org/abs/1008.5263v1

JETP vol.110 (2), 185 (2010)

Physics

Quantum Physics

9 pages, 6 figures

Scientific paper

10.1134/S1063776110020019

The problems associated with practical implementation of the scheme proposed for preparation of arbitrary states of polarization ququarts based on biphotons are discussed. The influence of frequency dispersion effects are considered, and the necessity of group velocities dispersion compensation in the frequency non-degenerate case even for continuous pumping is demonstrated. A method for this compensation is proposed and implemented experimentally. Physical restrictions on the quality of prepared two-photon states are revealed.

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