Collective-Mode Enhanced Matter-Wave Optics

Year: 2021

Authors: Deppner C., Herr W., Cornelius M., Stromberger P., Sternke T., Grzeschik C., Grote A., Rudolph R., Krutzik M., Wenzlawski A., Corgier R., Charron E., Guyry-Odelin D., Gaaloul N., Ldmmerzahl C., Peters A., Windpassinger P., Rasel EM., Herrmann S.

Autors Affiliation: Leibniz Univ Hannover, Inst Quantenopt, Welfengarten 1, D-30167 Hannover, Germany; Leibniz Univ Hannover, Deutsch Zent Luft & Raumfahrt eV, Inst Satellitengeodasie & Inertialsensorik, DLR SI, Callinstr 36, D-30167 Hannover, Germany; Univ Bremen, ZARM, Fallturm 2, D-28359 Bremen, Germany; Johannes Gutenberg Univ Mainz, Staudingerweg 7, D-55128 Mainz, Germany; Humboldt Univ, Inst Phys, Newtonstr 15, D-12489 Berlin, Germany; Univ Paris Saclay, Inst Sci Mol Orsay, CNRS, F-91405 Orsay, France; Univ Toulouse, CNRS, Lab Collis Agregats React, IRSAMC, 118 Route Narbonne, F-31062 Toulouse, France; Stanford Univ, Dept Phys, Stanford, CA 94305 USA; Quantum Sci & Technol Arcetri INO CNR, Largo Enrico Fermi 2, I-50125 Florence, Italy.

Abstract: In contrast to light, matter-wave optics of quantum gases deals with interactions even in free space and for ensembles comprising millions of atoms. We exploit these interactions in a quantum degenerate gas as an adjustable lens for coherent atom optics. By combining an interaction-driven quadrupole-mode excitation of a Bose-Einstein condensate (BEC) with a magnetic lens, we form a time-domain matter-wave lens system. The focus is tuned by the strength of the lensing potential and the oscillatory phase of the quadrupole mode. By placing the focus at infinity, we lower the total internal kinetic energy of a BEC comprising 101(37) thousand atoms in three dimensions to 3/2 k(B) center dot 38(-7)(+6) pK. Our method paves the way for free-fall experiments lasting ten or more seconds as envisioned for tests of fundamental physics and high-precision BEC interferometry, as well as opens up a new kinetic energy regime.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 127 (10)      Pages from: 100401-1  to: 100401-7

More Information: We acknowledge valuable discussions with R. Walser. This work is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) due to an enactment of the German Bundestag under Grant No. DLR 50WM1552-1557 (QUANTUS-V Fallturm), as well as by the Centre for Quantum Engineering and Space-Time Research and the Deutsche Forschungsgemeinschaft (German Research Foundation) under Germany’s Excellence Strategy-EXC 2123 Quantum FrontiersProject No. 390837967 at Leibniz University Hannover.
KeyWords: Bose-einstein Condensate; Precision-measurement; Excitations; Atoms
DOI: 10.1103/PhysRevLett.127.100401

Citations: 61
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