Erlangen 2022 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 14: Precision Measurements and Metrology III

Q 14.2: Talk

Tuesday, March 15, 2022, 10:45–11:00, Q-H11

3D Simulations of Guided BEC Interferometers — •Rui Li¹, Simon Kanthak², and Naceur Gaaloul¹ — ¹Leibniz Universität Hannover, Institute of Quantum Optics, Hannover, Germany — ²Humboldt-Universität zu Berlin, Institut für Physik, Berlin, Germany

Atom interferometry has grown into an extremely successful tool for precision measurements since the pioneering works of Mark Kasevich and Steve Chu [1, 2]. Experiments with record-breaking precision have been performed in the fields of inertial sensing and tests of the foundations of physics. These high precision measurements are achieved either by large momentum transfer (LMT) or long interrogation times (LIT). Bose-Einstein Condensates (BECs) can be used to further enhance precision atom interferometry due to its high coherence and narrow momentum width. In this talk, we use numerical methods to study BEC interferometers in an optical guide by time-evolving 3D Gross-Pitaevskii equation (GPE). We specifically investigate the double-Bragg diffraction (DBD) of BEC pulsed by two retroretlecting laser beams and its momentum distribution after time of flight (ToF) in the guide, which is provided by the dipole trap of the red-detuned Gaussian laser beam.

[1] Kasevich M. and Chu S., Phys. Rev. Lett., 67 (1991) 181.

[2] Kasevich M. and Chu S., Appl. Phys. B, 54 (1992) 321.