Rostock 2019 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 5: Precision Measurements and Metrology I
Q 5.4: Talk
Monday, March 11, 2019, 11:15–11:30, S SR 111 Maschb.
Twin-lattice interferometry — •Martina Gebbe1, Matthias Gersemann2, Sven Abend2, Jan-Niclas Siemß2,3, Naceur Gaaloul2, Sven Herrmann1, Klemens Hammerer3, Claus Lämmerzahl1, Ernst M. Rasel2, and The Quantus Team1,2,4,5,6,7 — 1ZARM, Uni Bremen — 2Institut für Quantenoptik, LU Hannover — 3ITP, LU Hannover — 4Institut für Physik, HU Berlin — 5Institut für Quantenphysik, Uni Ulm — 6Institut für Angewandte Physik, TU Darmstadt — 7Institut für Physik, JGU Mainz
Large momentum transfer in combination with Bose-Einstein condensates (BECs) is a key technique for future atomic gravitational wave detectors as well as for miniaturized inertial quantum sensors. Our twin lattice allows us to efficiently manipulate our delta-kick collimated BECs to form symmetric scalable beam splitters consisting of a combination of Double Bragg diffraction and Bloch oscillations. We succeed to interfere BECs moving at a differential velocity of up to 2.2 m/s in an interferometer involving a total of 1632 transferred photon momenta. We investigate the scalability of the momentum transfer both theoretically and experimentally. Studying the spatial interference reveals that our method is limited technically rather than fundamentally.
This work is supported by the CRC 1128 geo-Q and by the German Space Agency (DLR) with funds provided by the Federal Ministry of Economic Affairs and Energy (BMWi) due to an enactment of the German Bundestag under Grant No. DLR 50WM1552-1557 (QUANTUS-IV-Fallturm).