Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 26: Poster – Precision Measurement, Metrology, and Quantum Effects

Q 26.21: Poster

Tuesday, March 11, 2025, 14:00–16:00, Tent

Modeling LMT Atom Interferometers Using Adiabatic Perturbation Theory — •Eric P. Glasbrenner, Richard Lopp, and Wolfgang P. Schleich — Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQST), Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany

Atom interferometers have become essential tools for high-precision sensing, with applications in gravimetry, rotation sensing and quantum clock interferometry. Initially developed to test fundamental principles of relativity and quantum mechanics, they are now advancing toward practical and commercial use, requiring compact, miniaturized setups. To enhance sensitivity, large-momentum transfer methods, such as double Bragg diffraction, sequential pulses, or Bloch oscillations (BO), are employed. However, accurately modeling the non-adiabatic effects influencing these methods remains challenging. We propose a semi-analytical approach based on adiabatic perturbation theory (APT), supported by numerical simulations, to describe light-pulse beam splitters and mirrors. This approach enables a unified treatment of Bragg diffraction and Bloch oscillations and allows for the analysis of a wide range of interferometer types. Using APT, we model imprinted phases, including non-adiabatic effects such as e.g. Landau-Zener tunneling, and identify the limits where APT fails for BO-based atom interferometers. APT versatility in modeling different interferometer types is further demonstrated and validated through detailed numerical simulations.

Keywords: Atom Interferometry; Adiabatic Perturbation Theory; Large-Momentum-Transfer; Bloch Oscillations; Non-Adiabatic Effects