Abstract
The Siegert relation relates electric field and intensity correlations of light, under given assumptions. After a brief derivation of the relation, we present an experimental setup that can be implemented in a student laboratory: it allows measuring both field and intensity correlations at the same time, thus providing a direct test of the Siegert relation. Some experimental results are presented when the scattering medium corresponds to a cold atomic cloud. As a conclusion, we discuss typical situations where the relation fails.
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