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DTSTART;TZID=Europe/Berlin:20251120T100000
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CREATED:20251119T153828Z
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SUMMARY:DQ-mat Jour Fixe at PTB Braunschweig
DESCRIPTION:Location: PTB\, Vieweg-Bau\, Room 234 \, Bundesallee 100\, 38116 Braunschweig \nPlease requested to register your name on participants list with this link: https://seafile.projekt.uni-hannover.de/f/5a903832c3a0493a948f/ \nPlease note PhD students financed by DQ-mat are expected to join\, everyone else is expressly invited. \nProgramme of the Jour Fixe:\n10-12 a.m. Report of Topical Group (TG)\n„Designed quantum states for frequency metrology“ with presentations at least from A01\, A10\, B02\, B03\, B04\nVieweg-Bau\, R234 \n12-1 p.m. Lunch\nPTB casino \n1-3:30 p.m. Lab tours\nPTB labs \n3:30-4 p.m. Coffee & Tea\nVieweg-Bau\, R234 \n4-5 p.m. Colloquium Arno Rauschenbeutel (title & abstract below)\nVieweg-Bau\, R234 \n7-9 p.m. Dinner with Arno Rauschenbeutel (please contact Nils Huntemann if you want to join) \nColloquium title: Rethinking Resonance Fluorescence: Fundamental Insights and Emerging Quantum Technologies\nAbstract: Resonance fluorescence – the light emitted by a coherently driven two-level quantum emitter – has long served as a paradigm in quantum optics. In this talk\, I will present two recent experimental investigations that reveal both the fundamental richness and the technological potential of this seemingly simple system. In the first part\, I revisit the textbook notion that a single atom cannot scatter two photons simultaneously. Our results provide direct experimental evidence for an alternative quantum interference-based explanation\, in which antibunching emerges from the coherent superposition of distinct two-photon scattering amplitudes. By selectively suppressing the coherently scattered component of the fluorescence spectrum\, we isolate photon pairs that are simultaneously scattered by the atom\, thereby validating a decades-old theoretical prediction. In the second part\, I will show how resonance fluorescence can be harnessed as a highly efficient source of time-bin entangled photon pairs. Using a beam splitter followed by a coincidence detection\, we transform the emission from a single atom into a stream of maximally entangled photon pairs\, achieving a strong violation of a Bell inequality. Together\, these experiments illustrate how resonance fluorescence – traditionally viewed as a fundamental textbook example – can be reimagined as a powerful resource for quantum information science. \nAccess data for the transfer: Zoom Access: https://us04web.zoom.us/j/932734874
URL:https://qvls.de/event/dq-mat-jour-fixe-at-ptb-braunschweig/
LOCATION:Niedersachsen
CATEGORIES:Bildung,Forschung
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