Generation of Polarization Entangled States in Spatially Inhomogeneous Ferroelectrics
The key point of the present work is establishing some links between features of spatial nonlinear (χ (2) ≠ 0) structures and entanglement degree of the states generated inside. The experiments and calculations we performed demonstrate that multiply domained structures can in principle provide one with highly entangled polarization-frequency states. Spectral behavior of entanglement degree (concurrence) allows us to build an adequate model of domain structure of Potassium Dihydrogen Phosphate. To check the validity of the model we built and analyzed experimentally the simplest spatially inhomogeneous structure that gives similar features of concurrence.
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Document Type: Research Article
Publication date: 2009-12-01
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