Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 50: Matter Wave Interferometry and Metrology II
Q 50.6: Vortrag
Donnerstag, 5. März 2026, 12:15–12:30, P 11
Composite light-pulse atom interferometry with Bragg and Raman double diffraction — •Simon Kanthak1, Ekim T. Hanimeli2, Matthias Gersemann3, Mikhail Cheredinov3, Markus Krutzik1, Sven Herrmann2, Sven Abend3, Ernst M. Rasel3, and the QUANTUS team1,2,3,4 — 1Institut für Physik, HU Berlin — 2ZARM, Universität Bremen — 3Institut für Quantenoptik, LU Hannover — 4Technische Universität Darmstadt
Double diffraction in light-pulse atom interferometry gives rise to symmetric interferometer geometries via oppositely directed momentum transfers. This technique intrinsically doubles the phase sensitivity of the interferometer and suppresses systematic uncertainties, however suffers from spurious atoms in parasitic interferometer paths. While double-diffraction schemes have been implemented using either Bragg or Raman transitions, one has to decide between an enhanced noise-suppression and the straight-forward application of blow-away pulses depending on the absence or presence of internal state changes.
This talk presents a composite light-pulse approach, which relies on a sequence of Bragg and Raman pulses rather than individual ones to exploit manipulations of both the internal and external degrees of atoms. Specifically, we demonstrate the application of Raman state-flips in double Bragg interferometry to recover the interferometric contrast alongside a reduction of the intrinsic phase noise.
The project is supported by the German Space Agency DLR with funds provided by the Federal Ministry for Economic Affairs and Climate Action (BMWK) under grant number DLR 50 WM 2450B.
Keywords: Atom Interferometry; Bose-Einstein Condensates; Double Diffraction; Bragg Diffraction; Raman Diffraction