Freiburg 2019 – wissenschaftliches Programm
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FM: Fall Meeting
FM 24: Quantum Sensing: Entanglement and Beyond Shot Noise
FM 24.2: Talk
Montag, 23. September 2019, 16:45–17:00, 3044
Squeezing and entanglement in spinor Bose-Einstein condensates — Karsten Lange1, Jan Peise1, Ilka Kruse1, Giuseppe Vitagliano2,3, Iagoba Apellaniz3, Matthias Kleinmann3, Géza Tóth3, and •Carsten Klempt1 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany — 2Institute for Quantum Optics and Quantum Information (IQOQI), Austrian Academy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria — 3Department of Theoretical Physics, University of the Basque Country UPV/EHU, P.O. Box 644, E-48080 Bilbao, Spain
Spin-changing collisions can be employed for the generation of entanglement in spinor Bose-Einstein condensates, in close analogy to optical parametric down-conversion. I will present the creation of two types of entangled states, Twin-Fock states and two-mode squeezed states. Both states can be applied for interferometry beyond the Standard Quantum Limit.
We have demonstrated that such entangled states can be separated in the spatial domain to transfer the entanglement from internal to external degrees of freedom [1]. I will discuss methods to employ spin-entangled Bose-Einstein condensates for inertially sensitive atom interferometers.
[1] K. Lange, J. Peise, B. Lücke, I. Kruse, G. Vitagliano, I. Apellaniz, M. Kleinmann, G. Toth, C. Klempt, Entanglement between two spatially separated atomic modes, Science 360, 416 (2018).