Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster: Quantum Optics and Photonics III

Q 57.6: Poster

Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik

Delta-Kick Collimation of BECs in an Optical Waveguide - A Source for Guided Atom Interferometry — •Knut Stolzenberg, Sebastian Bode, and Dennis Schlippert — Institut für Quantenoptik, Hannover, Germany

Guided atom-interferometers promise to be a candidate for compact inertial sensors with long pulse separation times, leading to a higher sensitivity of the atom interferometer [1]. After condensation in a crossed optical dipole trap the ⁸⁷Rb BEC is loaded into a one dimensional optical waveguide. This diabatic transfer drives collective excitations in the ensemble. Via an orthogonally applied optical delta-kick collimation pulse the oscillation amplitude and expansion rate can be dramatically reduced. The narrowed velocity distribution paves the way for a stable diffraction in the interferometry sequence [2]. The ensemble’s time evolution is modelled by the scaling approach to simulate and optimise the collimation pulse [3]. Coherent manipulation of the collimated BEC during interferometry will be done via Double-Bragg-diffraction suppressing the impact of the Bragg-pulse phase noise [2].

[1] G. D. McDonald et al., PRA 87, 013632 (2013)
[2] H. Ahlers et al., PRL 116, 173601 (2016)
[3] R Corgier et al 2018 New J. Phys. 20 055002 116, 173601 (2016)