Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 59: Ultra-cold atoms, ions and BEC IV (joint session A/Q)
Q 59.1: Vortrag
Donnerstag, 13. März 2025, 14:30–14:45, GrHS Mathe
Dark energy search using atom interferometry in microgravity — •Sukhjovan Singh Gill1, Magdalena Misslisch1, Charles Garcion1, Alexander Heidt2, Ioannis Papadakis3, Vladimir Schkolnik3, Christoff Lotz2, Sheng-Wey Chiow4, Nan Yu4, and Ernst Rasel1 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germay 30167 — 2Institut für Transport- und Automatisierungstechnik, Leibniz Universität Hannover, Hannover, 30167, Germany — 3Institut für Physik, Humboldt Universität zu Berlin, Berlin, Germany 12489 — 4Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA 91109
The nature of dark energy is one of the biggest quests of modern physics and is crucial for explaining the accelerated expansion of the universe. In the chameleon theory, a scalar field is proposed, which is hidden due to a screening effect in the vicinity of bulk masses to make the model concord with observations. DESIRE project studies the chameleon field model using Bose-Einstein condensates of 87Rb atoms as a source in a microgravity environment. The Einstein-Elevator at Leibniz University Hannover provides 4 seconds of microgravity time for multi-loop atom interferometry to search for phase contributions induced by chameleon fields influenced by variations in mass density.
Bloch oscillations are intended to transport the BEC from the atom chip to the test-mass to perform atom interferometry. Landau-Zener and Wannier-Stark models are employed to simulate losses during transport for precise selection of the lattice depth, detuning, and pulse shape for an efficient transport.
Keywords: Dark Energy; Bloch Oscillations; Einstein Elevator; Bose-Einstein Condensate; BEC