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Q: Fachverband Quantenoptik und Photonik
Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects
Q 26.14: Poster
Dienstag, 11. März 2025, 14:00–16:00, Tent
Absolute light-shift compensated twin-lattice atom interferometry — •Mikhail Cheredinov1, Matthias Gersemann1, Ekim T. Hanimeli2, Simon Kanthak3, Sven Abend1, Ernst M. Rasel1, and the QUANTUS team1,2,3,4,5,6 — 1Institut für Quantenoptik, LU Hannover — 2ZARM, Uni Bremen — 3Institut für Physik, HU zu Berlin — 4Institut für Quantenphysik, Uni Ulm — 5Institut für Angewandte Physik, TU Darmstadt — 6Institut für Physik, JGU Mainz
Twin-lattice atom interferometry is a method for forming symmetric interferometers with matter waves of large relative momentum spitting by using two counter-propagating optical lattices. This method utilizes double Bragg diffraction in combination with Bloch oscillations. It has the potential to enable highly sensitive inertial measurements. Until now, a limiting factor for this type of large momentum transfer has been the loss of contrast in the interferometer. Differential absolute light shifts arise due to diffraction effects of our Gaussian beam at apertures and other imperfections. By using a Flat-Top beam profile, such diffraction effects can be suppressed. Adding an oppositely detuned light field helps to cancel out remaining absolute light shifts. This contribution presents the recent results of this realization of a twin-lattice atom interferometer.
We acknowledge financial support by the Deutsche Forschungs-gemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy - EXC-2123 QuantumFrontiers - 390837967 and by DLR under grant no. DLR 50WM2450A (QUANTUS-VI).
Keywords: AC-Stark shift; Flat-Top beam profile; Bragg diffraction; Bloch oscillations; Bose–Einstein condensate