Bragg-diffraction-induced imperfections of the signal in retroreflective atom interferometers

• URL: http://arxiv.org/abs/2203.07017v2
• Date: Mon, 20 Jun 2022 08:58:21 GMT
• Title: Bragg-diffraction-induced imperfections of the signal in retroreflective atom interferometers
• Authors: Jens Jenewein, Sabrina Hartmann, Albert Roura, Enno Giese
• Abstract summary: Off-resonant higher-order diffraction leads to population loss, spurious interferometer paths, and diffraction phases. We compare first-order single and double Bragg diffraction in retroreflective setups. Some effects of diffraction phases can be avoided by adding the population of the outer exit ports of double diffraction.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a detailed study of the effects of imperfect atom-optical manipulation in Bragg-based light-pulse atom interferometers. Off-resonant higher-order diffraction leads to population loss, spurious interferometer paths, and diffraction phases. In a path-dependent formalism, we study numerically various effects and analyze the interference signal caused by an external phase or gravity. We compare first-order single and double Bragg diffraction in retroreflective setups. In double Bragg diffraction, phase imperfections lead to a beating due to three-path interference. Some effects of diffraction phases can be avoided by adding the population of the outer exit ports of double diffraction.

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