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Q: Fachverband Quantenoptik und Photonik

Q 69: Quantum effects: Interference and correlations II

Q 69.1: Vortrag

Freitag, 21. März 2014, 16:30–16:45, DO26 208

How much information does a parametric down-conversion state contain? — •Vahid Ansari, Benjamin Brecht, Georg Harder, and Christine Silberhorn — Universität Paderborn, Integrierte Quantenoptik, Warburger Str. 100, D-33098 Paderborn

We present a theoretical and experimental study of the correlation time of a biphoton state generated in the process of parametric down-conversion. We show that this correlation time does not actually depend on the coherence time of the pump light, but is only determined by the crystal length and phase-matching conditions. Furthermore, we investigate the properties of the PDC biphoton wavepacket with different types of time-frequency correlations and their suitability for quantum-enhanced applications.