Optical realization of the two-site Bose-Hubbard model in waveguide   lattices
  A classical realization of the two-site Bose-Hubbard Hamiltonian, based on light transport in engineered optical waveguide lattices, is theoretically proposed. The optical lattice enables a direct visualization of the Bose-Hubbard dynamics in Fock space. 
Stefano Longhi
quant-ph