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Q: Fachverband Quantenoptik und Photonik
Q 17: Quantum Optics (Miscellaneous) III
Q 17.5: Vortrag
Dienstag, 15. März 2022, 11:45–12:00, Q-H14
Engineering the photon statistics by destructive and constructive two-photon interference — •Max Schemmer, Martin Cordier, Philipp Schneeweiss, Jürgen Volz, and Arno Rauschenbeutel — Department of Physics, Humboldt-Universität zu Berlin, 10099 Berlin, Germany
Interference phenomena are at the origin of for many intriguing effects in physics and in particular in the field of quantum optics (e.g., double-slit experiment). Here, we demonstrate a type of quantum interference that allows us to engineer the photon statistics of a laser light field via the interaction with an ensemble of cold atoms. When probing the ensemble with resonant light (D2 line of Cesium), entangled photon-pairs can be generated that will interfere with the two-photon components of the incoming light [1]. Here we show how the relative amplitude and phase of these entangled photon-pairs can be tuned by controlling the number of atoms and the detuning of the laser light. Using this effect, the photon-statistics can be tuned from bunching to antibunching. Our results open new routes for realizing nonclassical light sources with variable g(2)(τ) based on weak, collectively enhanced nonlinearities.
[1] Prasad et al., Nature Photonics 1 (2020).