Erlangen 2022 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 14: Precision Measurements and Metrology III
Q 14.4: Talk
Tuesday, March 15, 2022, 11:15–11:30, Q-H11
Analytic 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 separation between the two arms of the interferometer are Bloch oscillations. Despite operating in the adiabatic regime, finite lattice ramping times will eventually lead to non-adiabatic corrections.
We develop an analytic model that describes non-adiabatic corrections to excited Bloch bands and verify our model by comparing to an exact numerical integration of the Schrödinger equation [Fitzek et al., Sci Rep 10, 22120 (2020)]. Furthermore, we characterize losses to excited Bloch bands as well as losses to the continuum to discuss their role for the realization 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).