SPONTANEOUS PARAMETRIC DOWN-CONVERSION IN BIAXIAL CRYSTALS: PECULIARITIES OF THE POLARIZATION STATE
- Authors: Frolovtsev D.N.1, Magnitskiy S.A1
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Affiliations:
- Lomonosov Moscow State University, Faculty of Physics
- Issue: Vol 165, No 1 (2024)
- Pages: 32-42
- Section: Articles
- URL: https://journals.rcsi.science/0044-4510/article/view/256895
- DOI: https://doi.org/10.31857/S0044451024010048
- ID: 256895
Cite item
Abstract
A consistent analysis of the quantum state of polarization of SPDC radiation is presented and the peculiarities of the quantum state of polarization of SPDC in biaxial nonlinear optical crystals are considered. It is shown that the SPDC polarization deviation angle can exceed 15°, and the angle between the signal and idler wave vectors D can exceed 30°. Estimates of the curvature of the cone formed by SPDC radiation in biaxial crystals are also given. The influence of SPDC polarization deviation in a non-collinear mode on the entanglement of biphoton states generated by a double-crystal scheme is analyzed, it is shown that Tangle of the generated quantum state can deteriorate by 6%, and conditions are identified under which entanglement can be completely restored.
About the authors
D. N. Frolovtsev
Lomonosov Moscow State University, Faculty of Physics
Author for correspondence.
Email: dfrolovtsev@gmail.com
Russian Federation, 119991, Moscow
S. A Magnitskiy
Lomonosov Moscow State University, Faculty of Physics
Email: dfrolovtsev@gmail.com
Russian Federation, 119991, Moscow
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