Double-Well Quantum Tunneling Visualized via Wigner's Function
  We investigate quantum tunneling in smooth symmetric and asymmetric double-well potentials. Exact solutions for the ground and first excited states are used to study the dynamics. We introduce Wigner's quasi-probability distribution function to highlight and visualize the non-classical nature of spatial correlations arising in tunneling. 
Dimitris Kakofengitis, Ole Steuernagel
quant-ph