SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 59: Poster IV
Q 59.25: Poster
Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof
Effective theory for Bloch-oscillation-based LMT atom interferometry — •Florian Fitzek1,2, Jan-Niclas Siemß1,2, Naceur Gaaloul2, and Klemens Hammerer1 — 1Institut für Theoretische Physik, Leibniz Universität Hannover, Germany — 2Institut für Quantenoptik, Leibniz Universität Hannover, Germany
Light-pulse atom interferometers are quantum sensors that enable a wide range of high-precision measurements such as the determination of inertial and electromagnetic forces or the fine-structure constant. Increased sensitivities can be achieved by implementing large momentum transfer (LMT) techniques. A well-known method to increase the momentum of the arms of an interferometer are sequential Bloch oscillations.
We present an accurate description for Bloch pulses based on Wannier-Stark states [Glück et al., Physics Reports 366, 6 (2002)] and the adiabatic theorem for non-hermitian Hamiltonians and verify our model by comparing to an exact numerical integration of the Schrödinger equation [Fitzek et al., Sci Rep 10, 22120 (2020)]. Based on this model, we characterize losses as well as phase uncertainties induced by lattice depth fluctuations in the context of LMT atom interferometry.
This work is supported through the Deutsche Forschungsgemeinschaft (DFG) under EXC 2123 QuantumFrontiers, Project-ID 390837967 and under the CRC1227 within Project No. A05 as well as by the VDI with funds provided by the BMBF under Grant No. VDI 13N14838 (TAIOL).