Observing the transition from quantum to classical energy correlations with photon pairs

28 Nov 2017  ·  Lerch Stefan, Stefanov André ·

We experimentally demonstrate a method to control the relative amount of quantum and classical energy correlations between two photons from a pair emitted by spontaneous parametric downconversion. Decoherence in the energy basis is achieved by applying random spectral phases on the photons... As a consequence a diverging temporal second order correlation function is observed and is explained by a mixture between an energy entangled pure state and a fully classically correlated mixte state. read more

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Quantum Physics