Feshbach resonance: A one dimensional example

摘要

We present a simple, one-dimensional example of a total spin-1/2 atom that interacts with another static atom in the presence of an external magnetic field. The interaction consists of delta potentials that act differently with each of the two components of the wavefunction. The system has two coupled channels, admits a closed solution, and features the Feshbach resonance phenomenon by proper tuning of the magnetic field.