Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session H09: Matter-Wave Optics and Interferometry
8:00 AM–10:00 AM,
Wednesday, June 2, 2021
Chair: Edward Moan, UVA
Abstract: H09.00002 : Analytic Theory for Diffraction Phases in Bragg Interferometry*
8:12 AM–8:24 AM
Live
Presenter:
Jan-Niclas Siemß
(Leibniz University Hannover)
Authors:
Jan-Niclas Siemß
(Leibniz University Hannover)
Florian Fitzek
(Leibniz University Hannover)
Ernst M Rasel
(Leibniz University Hannover)
Naceur Gaaloul
(Leibniz University Hannover)
Klemens Hammerer
(Leibniz University Hannover)
We demonstrate that the diffraction phase when measuring relative atom numbers originates from the fact that quasi-Bragg beam splitters and mirrors are fundamentally multi-port operations governed by Landau-Zener physics (Siemß et al., Phys. Rev. A 102, 033709). We develop a multi-port scattering matrix representation of the popular Mach-Zehnder atom interferometer and discuss the connection between its phase estimation properties and the parameters of the Bragg pulses. Furthermore, our model includes the effects of linear Doppler shifts applicable to narrow atomic velocity distributions on the scale of the photon recoil of the optical lattice. As an illustration, with our microscopic model we study diffraction phase shift fluctuations caused by laser intensity noise affecting the sensitivity of the Mach-Zehnder atom interferometer.
*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).
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