activity
20222026
most citedQuantifying the presence of a neutron in the paths of an interferometer

24 citations · 38 across the 7 of their papers we have counts for

collaborators

8 papers

math.DG2026

New Explicit Examples of Mannheim Pairs in

José Alan, Renato Teixeira, Thiago Mendonça

In this paper, we construct new explicit parametrizations of Mannheim pairs in Euclidean 3-space. Unlike the known examples in the literature, which are essentially slant helices o…

quant-ph2025

Orbital Angular Momentum Generation in Schwinger Scattering from Perfect Quartz

Niels Geerits, Anna-Sophie Berger, Hartmut Lemmel +4

Static electric fields have been suggested as a spin to orbital angular momentum converter in neutrons. Initial calculations showed that the field required to facilitate significan…

physics.ins-det2024

CANISIUS The Austrian Neutron Spin Echo Interferometer

Niels Geerits, Simon Hack, Lara Brukner +4

The broad band resonant spin echo interferometer, CANISIUS, is presented. CANISIUS is built in a versatile way, such that it can be operated in both a continuous broad band beam or…

quant-ph2024

Measuring the Angular Momentum of a Neutron Using Earth's Rotation

Niels Geerits, Stephan Sponar, Kyle E. Steffen +6

A coupling between Earths rotation and orbital angular momentum (OAM), known as the Sagnac effect, is observed in entangled neutrons produced using a spin echo interferometer. Afte…

quant-ph2023★ 11 cited

Violation of a Leggett-Garg inequality using ideal negative measurements in neutron interferometry

Elisabeth Kreuzgruber, Richard Wagner, Niels Geerits +2

We report on an experiment that demonstrates the violation of a Leggett-Garg inequality (LGI) with neutrons. LGIs have been proposed in order to assess how far the predictions of q…

quant-ph2023★ 3 cited

Three-Path Quantum Cheshire Cat Observed in Neutron Interferometry

Armin Danner, Niels Geerits, Hartmut Lemmel +3

The paradoxical phenomenon of the quantum Cheshire Cat (qCC) refers to situations where different properties of a particle appear to be localised in different paths of an interfero…

quant-ph2022

Phase Vortex Lattices in Neutron Interferometry

Niels Geerits, Hartmut Lemmel, Anna-Sophie Berger +1

A combination of aluminium prisms inserted into a nested loop interferometer is used to generate a neutron phase vortex lattice with significant extrinsic orbital angular momentum,…

quant-ph2022★ 24 cited

Quantifying the presence of a neutron in the paths of an interferometer

Hartmut Lemmel, Niels Geerits, Armin Danner +3

It is commonly assumed that no accurate experimental information can be obtained on the path taken by a particle when quantum interference between the paths is observed. However, r…