Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 54: Posters: Quantum Optics and Photonics IV
Q 54.32: Poster
Thursday, March 12, 2020, 16:30–18:30, Empore Lichthof
Self-focusing of Bose-Einstein condensates — •Patrick Boegel1, Matthias Meister1, Jan-Niclas Siemß2, Naceur Gaaloul2, Maxim A. Efremov3, and Wolfgang P. Schleich1,3 — 1Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQST), Universität Ulm, Ulm, Germany — 2Institut für Quantenoptik, Leibniz University Hannover, Hannover, Germany — 3Institut für Quantentechnologien, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Ulm, Germany
The standard way to control the position and the strength of maximal focusing of a matter-wave is to use a lens which imprints a position-dependent phase on the initial wave. However, quantum mechanics allows focusing even without a lens [1,2], based on diffractive focusing, where the initial wave function is a real-valued one with a non-Gaussian shape. Hence, the problem of optimal focusing translates into finding an appropriate initial wave function [3]. We explore the phenomenon of diffractive focusing of an atomic Bose-Einstein condensate (BEC) in the regime, where the resonant atom-atom interaction plays a key role, and describe this effect in phase space within the Wigner function approach.
This project is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) under the grant numbers 50WP1705 and 50WM1862.
[1] Case, W.B. et al. Optics Express 20, 27253 (2012)
[2] Weisman D. et al. Phys. Rev. Lett. 118, 154301 (2017)
[3] Vogel, K. et al., Chem. Phys. 375, 133-143 (2010)