Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 49: Ultra-cold atoms, ions and BEC III (joint session A/Q)
Q 49.6: Talk
Thursday, March 17, 2022, 12:00–12:15, A-H2
Methods for atom interferometry with dual-species BEC in space — •Jonas Böhm1, Maike D. Lachmann1, Baptist Piest1, Ernst M. Rasel1, and the MAIUS team1,2,3,4,5,6 — 1Institut für Quantenoptik, LU Hannover — 2ZARM, U Bremen — 3DLR RY Bremen — 4Institut für Physik, HU Berlin — 5Institut für Quantenoptik, JGU Mainz — 6FBH, Berlin
Atom interferometry is a promising tool for precise measurements, e.g. for quantum tests of the weak equivalence principle. As the sensitivity scales with the squared time atoms spend in the interferometer, this recommends low expansion velocities of the atomic ensembles. Hence, conducting these experiments in microgravity with Bose-Einstein-Condensates (BEC) is of great interest. The sounding rocket mission MAIUS-1 demonstrated the first creation of a BEC and matter wave interferences in space [1,2]. With the follow-up missions MAIUS-2 and -3, we extend the apparatus by another species to perform atom interferometry with 87Rb and 41K, paving the way for implementing and testing the methods of dual-species interferometers on board of space stations or satellites. In this contribution, the manipulation of BECs using Raman double-diffraction processes to form (asymmetric) Mach-Zehnder-type interferometers, e.g. for inertial sensing, are presented for a compact, robust, and autonomously operating setup that generates 87Rb and 41K BECs with a high repetition rate.
[1] D. Becker, et al., Nature 562, 391-395 (2018). [2] M.D. Lachmann, H. Ahlers, et al., Ultracold atom interferometry in space. Nat Commun 12, 1317 (2021).