SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 2: Matter Wave Optics

Q 2.6: Vortrag

Montag, 6. März 2023, 12:30–12:45, E001

A reflective atom interferometer — •Johannes Fiedler and Bodil Holst — University of Bergen, Bergen, Norway

The field of atom interferometry has expanded enormously over the last few decades. Atom interferometers are used in various applications, from measuring fundamental physics constants to atomic clocks. Detailed planning is ongoing for using atom interferometers as dark matter and gravitational wave detectors. Most applications use cold atoms or BEC and split the wave function via laser pulses. Transmission interferometer with thermal atoms uses dielectric objects [1] or a standing laser field [2] to split the beam. Via these techniques, the matter wave can only be separated over a few mrad [3]. A reflected atom interferometer can dramatically enhance the beam splitting to a rad. In this talk, we will present a scheme for a reflective atom interferometer using the surface diffraction of two parallel plates to achieve the large-angle separation of the wave function [4]. We will show a realisable interferometer setup and demonstrate the expected interference patterns.

[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. in preparation.