KIP publications

year 2020
author(s) Simon R Müller, Patrick Nedelec and Markus K Oberthaler
title From classical xenon fringes to hydrogen interferometry
KIP-Nummer HD-KIP 20-64
KIP-Gruppe(n) F17,F24
document type Paper
source New J. Phys. 22, 073060
doi 10.1088/1367-2630/ab9bc1
Abstract (en)

A setup with three equally spaced transmission gratings can be described as a moiré deflectometer in the classical regime and as a Talbot–Lau interferometer in the quantum regime. We successfully operate such a three-grating device with a de Broglie wavelength span of more than two orders of magnitude (20 fm to 2.2 pm), employing different particles such as xenon, krypton, argon, helium, and hydrogen. With that we directly observe the transition from the classical description with fast xenon atoms, to the characteristic quantum behaviour of the Talbot–Lau interferometer using hydrogen atoms with correspondingly long de Broglie wavelength. The systematic study of the interference pattern gives important insights in the feasibility of a proton or antiproton interferometer with this setup.

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