arXiv subjects

Anna-Sophie Berger

Publications and source records attributed to Anna-Sophie Berger.

2 recordsLinked to original sources

arXiv2025

Orbital Angular Momentum Generation in Schwinger Scattering from Perfect Quartz

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 significant conversion to longitudinal orbital angular momentum is prohibitively high for lab power supplies. In this work we exploit the intra-atomic nuclear electric field in the periodic structure of perfect single crystals, specifically quartz, which can be orders of magnitude larger than lab fields. We calculate the Bragg and Laue diffracted wavefunctions of thermal neutrons and back-diffracted neutrons and demonstrate spin to orbital angular momentum conversion. Finally we report on a thermal neutron Bragg diffraction experiment from [110] quartz confirming our results.

quant-ph↗

arXiv2023

Phase Vortex Lattices in Neutron Interferometry

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, L_z=0.35, on a length scale of 220 microns, transverse to the propagation direction. Our method is a generalization of recently developed magnetic methods, such that we can exploit the strong nuclear interaction. The stronger potential of these prisms allows for the generation of a tighter lattice. Combined with recent advances in neutron compound optics and split crystal interferometry our method may be applied to the generation of intrinsic neutron orbital angular momentum states. Finally, we assert that, in its current state, our setup is directly applicable to anisotropic ultra small angle neutron scattering.

quant-ph↗