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Q: Fachverband Quantenoptik und Photonik

Q 45: Quantum Metrology for Fundamental Physics

Q 45.5: Talk

Thursday, March 14, 2024, 12:15–12:30, HS 1221

Reflective atom interferometer and its applications — •Johannes Fiedler and Bodil Holst — Department of Physics and Technology, University of Bergen, Norway

The field of atom interferometry has experienced significant growth in recent decades, finding applications in diverse areas, from measuring fundamental physics constants to precision atomic clocks. Many applications involve the use of cold atoms or Bose-Einstein condensates, employing laser pulses to split the atomic wave function. In contrast, transmission interferometers with thermal atoms utilize dielectric objects [1] or a standing laser field [2] for beam splitting, limiting the separation to a few milliradians [3]. This presentation introduces a reflective atom interferometer scheme, leveraging surface diffraction between two parallel plates to achieve a large-angle separation of the wave function [4]. The talk covers a feasible interferometer setup, showcases expected interference patterns, and outlines optimal designs for applications in acceleration measurements and velocity selection.

[1] N. Gack et al. Phys. Rev. Lett. 125, 050401 (2020). [2] S. Eibenberger et al. Phys. Rev. Lett. 112, 250402 (2014). [3] C. Brand et al. Nature Nanotechnology 10, 845 (2015). [4] J. Fiedler et al. Phys. Rev. A 108, 023306 (2023).

Keywords: Matter-wave interferometry; Quantum metrology