Casimir-Polder interaction of neutrons with metal or dielectric surfaces

Abstract

We predict a repulsive Casimir-Polder-type dispersion interaction between a single neutron and a metal or dielectric surface. We consider a scenario where a single neutron is subject to an external magnetic field. Due to its intrinsic magnetic moment, the neutron then forms a magnetisable two-level system which can exchange virtual photons with a nearby surface. The resulting dispersion interaction between a purely magnetic object (neutron) and a purely electric one (surface) is found to be repulsive, in contrast to the typical attractive interaction between electric objects. Its magnitude is considerably smaller than the standard atom--surface Casimir-Polder force due to the magnetic nature of the interaction and the smallness of the electron-to-neutron mass ratio. Nevertheless, we show that it can be comparable to the gravitational potential of the same surface and should be taken into consideration in future neutron interference experiments.

arXiv comment8 pages, 4 figures

References in corpus (21)

• Measurement of the permanent electric dipole moment of the neutron
• Measurement of the Temperature Dependence of the Casimir-Polder Force
• Repulsive Casimir forces
• Casimir-Lifshitz Theory and Metamaterials
• Thermal corrections to the Casimir effect
• Casimir Interactions for Anisotropic Magnetodielectric Metamaterials
• Influence of slab thickness on the Casimir force
• Casimir force between designed materials: what is possible and what not
• Constraints on stable equilibria with fluctuation-induced forces
• Ramsey's Method of Separated Oscillating Fields and its Application to Gravitationally Induced Quantum Phaseshifts
• Acoustic Rabi oscillations between gravitational quantum states and impact on symmetron dark energy
• Ground-state van der Waals forces in planar multilayer magnetodielectrics
• A large-scale magnetic shield with 10^6 damping at mHz frequencies
• Van-der-Waals potentials of paramagnetic atoms
• A quantum mechanical description of the experiment on the observation of gravitationally bound states
• The impact of magnetic properties on atom-wall interaction
• Temperature dependence of the magnetic Casimir-Polder interaction
• Spectrometer for new gravitational experiment with UCN
• Anomalous magnetic moment of an electron near a dispersive surface
• van der Waals and Casimir-Polder interactions between neutrons
• Distinguishing models of surface response through the self-energy of an electron