SAMOP 2021 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 13: Quantum Gases and Matter Waves (joint session Q/A)
A 13.11: Poster
Dienstag, 21. September 2021, 16:30–18:30, P
Time-domain optics for atomic quantum matter — •Simon Kanthak1,2, Martina Gebbe3, Matthias Gersemann4, Sven Abend4, Ernst M. Rasel4, Markus Krutzik1,2, and the QUANTUS team1,2,3,4 — 1Institut für Physik, HU Berlin — 2Ferdinand-Braun-Institut, Berlin — 3ZARM, Universität Bremen — 4Institut für Quantenoptik, LU Hannover
We investigate time-domain optics for atomic quantum matter. Within a matter-wave analog of the thin-lens formalism, we study optical lenses of different shapes and refractive powers to precisely control the dispersion of Bose-Einstein condensates. Anharmonicities of the lensing potential are incorporated in the formalism with a decomposition of the center-of-mass motion and expansion of the atoms, allowing to probe the lensing potential with micrometer resolution. By arranging two lenses in time formed by the potentials of an optical dipole trap and an atom-chip trap, we realize a magneto-optical matter-wave telescope. We employ this hybrid telescope to manipulate the expansion and aspect ratio of the ensembles. The experimental results are compared to numerical simulations that involve Gaussian shaped potentials to accommodate lens shapes beyond the harmonic approximation.
This work is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under Grant No. 50WM1952 (QUANTUS-V-Fallturm).