Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.26: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1+2

Simulation of 3D atomic Bragg beam splitters — •Antje Neumann and Reinhold Walser — Institut für Angewandte Physik TU-Darmstadt, Darmstadt, Germany

Atoms are the ultimate quantum sensors. In the configuration of an atom interferometer they provide the opportunity of high-precision rotation and acceleration sensing. Potential applications are inertial navigation, geological exploration and fundamental physics. In the QUANTUS free-fall experiments atom interferometry is the central method as well.

Like in optical systems, matter wave devices like traps, beam splitters and mirrors require specifications and ubiquitous imperfections need to be quantified. In particular, we study the response and aberrations due to spatio-temporal laser beam envelopes, wave front curvatures and spontaneous emission of a Bragg beam splitter. We present results of numerical and analytical studies of the velocity dependence of the complex reflectivities of the beam splitter. Finally, this is applied to obtain the diffraction efficiency of a Bragg beam splitter for thermal and Bose-condensed atomic ensembles.