Twisting Neutral Particles with Electric Fields
Niels Geerits, Stephan Sponar
TL;DR
This paper shows that neutral spin-1/2 particles can acquire spin-orbit coupled states when passing through an electric field, with potential experimental verification using neutron optics.
Contribution
It introduces a method to generate and analyze spin-orbit coupled states in neutral particles via electric fields, including a proposed experimental setup.
Findings
Spin-orbit coupled states are generated in neutral particles.
Total angular momentum of the particle is conserved.
A neutron optical experiment is proposed to measure the effect.
Abstract
We demonstrate that spin-orbit coupled states are generated in neutral magnetic spin 1/2 particles travelling through an electric field. The quantization axis of the orbital angular momentum is parallel to the electric field, hence both longitudinal and transverse orbital angular momentum can be created. Furthermore we show that the total angular momentum of the particle is conserved. Finally we propose a neutron optical experiment to measure the transverse effect.
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