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Lecture 12- Entanglement

Fred Jendrzejewski, Selim Jochim, Matthias Weidemüller

Published Apr 12, 2021• 0 citations
Publisher

Abstract

We will discuss the creation of entangled photons and how they can be used for the test of Bell’s inequalities.
DOI
10.22541/au.154324955.50897896/v2

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This chapter presents an account of work carried out on metastable atomic hydrogen to measure the polarisation correlation of the two photons produced in the decay process and to test Bell’s inequality and ideas of enhancement. It describes the theory of the two-photon decay will be discussed and an appropriate form of Bell’s inequality. Experiments to test Bell’s inequality usually involve placing a linear polariser and detector diametrically on each side of a source. The measurements of the circular polarisation correlation were not in a form suitable to test Bell’s inequality directly and indicated that the imperfections of the nominally achromatic quarter-wave plates were such as to render unlikely a successful test along these lines. Measurements of the linear and circular polarisation have been carried out and Bell’s inequality put to the test.
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