Spatial Bunching of Entangled Four Photons

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Spatial Bunching of Entangled Four Photons

Type: Master thesis
Title: Spatial Bunching of Entangled Four Photons
Author: Sabharwal, Snigdh
Issue Date: 2017
Keywords: Spatial Bunching Entangled Four Photons
Abstract: We observe spatial bunching of four spatially entangled photons produced by parametric down-conversion in a single periodically poled KTP crystal. This effect involves an increased probability to generate all four photons in the same optical mode. To observe the effect we create entangled double pairs at 826 nm wavelength using a 5 mm long crystal and investigate their correlations by measuring three-fold coincidence counts. We demonstrate that two-fold and three-fold coincidence measurements are sufficient to experimentally distinguish a spatially entangled two-photon state from a four-photon state and a four-photon state from a six-photon state, respectively. This makes experimental observation of the effect feasible at moderately high pump-powers.
Supervisor: Dood, M.J.A. de
Faculty: Faculty of Science
Department: Physics (Master)
Specialisation: M.Sc
ECTS Credits: 5

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