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Experimental Setup For Measuring The Bell Inequalities

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Màster Oficial de Ciència i Tecnologia Quàntiques / Quantum Science and Technology, Facultat de Física, Universitat de Barcelona. Curs: 2022-2023. Tutors: Bruno Julia Diaz, José María Gómez Cama

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This master thesis centers on the construction, development and characterization of an experimental setup to demonstrate quantum nonlocality using polarization-entangled photons through a Bell Test. The generation of
polarization-entangled photon pairs is accomplished through Type-I Spontaneous Parametric Down-Conversion (SPDC), using a pair of Beta Barium Borate (BBO) crystals.
The thesis explores the theoretical foundations of SPDC and describes the assembly and alignment process of the system to obtain entangled photon pairs.
A significant violation of Bell’s inequalities is observed with a confidence level around 4-σ. This violation is demonstrated using two different entangled states, providing empirical evidence for the existence of non-local correlations beyond classical theories, supporting the principles of quantum mechanics

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Màster Oficial - Ciència i Tecnologia Quàntiques / Quantum Science and Technology

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Experimental Setup For Measuring The Bell Inequalities