Emergence of a Brunnian neutron state

Understand

We discuss a quantum-statistical feature of non-relativistic identical fermions whose interaction is predominantly attractive at low energies.

• Specifically, we consider exotic, multi-neutron nuclei.
• From the enhancement of an arbitrarily small P-wave interaction between two nucleons, we infer the existence of a particle-stable nucleus composed entirely of neutrons.
• While we cannot specify the number of neutrons in the system, we predict that none of its substructures is bound.