Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster: Quantum Optics and Photonics III
Q 57.10: Poster
Thursday, March 14, 2019, 16:15–18:15, S Fobau Physik
Optimal control technique for fast excitation-less transport of BECs on an atom chip — •Sirine Amri1,2, R. Corgier2,1, D. Sugny3, E.M Rasel2, E. Charron1, and N. Gaaloul2 — 1ISMO, Université Paris-Saclay, Bât.520, 91400 Orsay France — 2Institute of Quantum Optics, LUH, Welfengarten 1 30167, Germany — 3ICB, Université de Bourgogne, 20178 Dijon Cedex, France
Recent proposals for testing foundations of physics assume Bose-Einstein condensates (BECs)as sources of atom interferometry sensors. In this context, atom chip devices allow to build transportable BEC machines with high flux and high repetition rates, as demonstrated within the QUANTUS (drop tower) and MAIUS (sounding rocket) [D. Becker et al, Nature, 562, 391 (2018).] micro-gravity experiments. According to the specific atom interferometric sequence considered, the external degrees of freedom of the BEC need to be manipulated after its creation. We present optimal control theory protocols for the fast, excitation-less transport of BECs with atom chips, i.e. engineering transport ramps with durations not exceeding 200 ms with realistic 3D anharmonic traps. This controlled transport is implemented over large distances, typically of the order of 1-2 mm, i.e. of about 1,000 times the size of the atomic cloud. The advantages over shortcut-to-adiabaticity schemes reported by our team [R. Corgier et al. NJP 20, 055002 (2018)] will be discussed.