Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 40: Precision Measurements and Metrology (Atom Interferometry)

Q 40.6: Vortrag

Donnerstag, 12. März 2020, 12:30–12:45, a310

Universal atom interferometry simulator for precision sensing — •Florian Fitzek1,2, Jan-Niclas Siemß1,2, Holger Ahlers2, Ernst M. Rasel2, Klemens Hammerer1, and Naceur Gaaloul21Institut für Theoretische Physik, LU Hannover — 2Institut für Quantenoptik, LU Hannover

Quantum sensors based on light-pulse atom interferometers allow for high-precision measurements of inertial and electromagnetic forces, accurate determination of fundamental constants as the fine structure constant α or to test foundational laws of modern physics as the equivalence principle. The full potential, i.e. sensitivity of these schemes unfolds when large interrogation times or macroscopic arm separation could be implemented. Both directions, however, imply a substantial deviation from an ideal interaction of light with atomic systems. Indeed, real-life complications as finite pulse areas and fidelities, momentum width broadening of the cold clouds, atomic interactions or light fields distortions limit the measurements but more dramatically hinder a reasonable systematics study. This is mainly due to the limited number of analytical cases and to the realistic numerical calculations being intractable.

In this study, we contribute to the precise formulation and simulation of the aforementioned effects by employing a position space solver of the Gross-Pitaevskii equation. We specifically target problems connected to gravity sensing as well as the dephasing in trapped atom interferometers. The work is supported by the VDI with funds provided by the BMBF under Grant No. VDI 13N14838 (TAIOL).

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