Correction of dephasing oscillations in matter-wave interferometry

Rembold, Alexander; Schütz, Georg; Chang, Wei-Tse; Stefanov, André; Pooch, Andreas; Hwang, Ing S.; Günther, A.; Stibor, Alexander (2014). Correction of dephasing oscillations in matter-wave interferometry. Physical review. A - atomic, molecular, and optical physics, 89(3), 033635. American Physical Society 10.1103/PhysRevA.89.033635

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Vibrations, electromagnetic oscillations, and temperature drifts are among the main reasons for dephasing in matter-wave interferometry. Sophisticated interferometry experiments, e.g., with ions or heavy molecules, often require integration times of several minutes due to the low source intensity or the high velocity selection. Here we present a scheme to suppress the influence of such dephasing mechanisms—especially in the low-frequency regime—by analyzing temporal and spatial particle correlations available in modern detectors. Such correlations can reveal interference properties that would otherwise be washed out due to dephasing by external oscillating signals. The method is shown experimentally in a biprism electron interferometer where a perturbing oscillation is artificially introduced by a periodically varying magnetic field. We provide a full theoretical description of the particle correlations where the perturbing frequency and amplitude can be revealed from the disturbed interferogram. The original spatial fringe pattern without the perturbation can thereby be restored. The technique can be applied to lower the general noise requirements in matter-wave interferometers. It allows for the optimization of electromagnetic shielding and decreases the efforts for vibrational or temperature stabilization.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Applied Physics

UniBE Contributor:

Stefanov, André

Subjects:

600 Technology > 620 Engineering

ISSN:

1050-2947

Publisher:

American Physical Society

Language:

English

Submitter:

Martin Frenz-Lips

Date Deposited:

05 Feb 2015 10:31

Last Modified:

10 Feb 2016 12:12

Publisher DOI:

10.1103/PhysRevA.89.033635

BORIS DOI:

10.7892/boris.62375

URI:

https://boris.unibe.ch/id/eprint/62375

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