Quantum Simulation of Spin Models on an Arbitrary Lattice with Trapped   Ions
  A collection of trapped atomic ions represents one of the most attractive platforms for the quantum simulation of interacting spin networks and quantum magnetism. Spin-dependent optical dipole forces applied to an ion crystal create long-range effective spin-spin interactions and allow the simulation of spin Hamiltonians that possess nontrivial phases and dynamics. Here we show how appropriate design of laser fields can provide for arbitrary multidimensional spin-spin interaction graphs even for the case of a linear spatial array of ions. This scheme uses currently existing trap technology and is scalable to levels where classical methods of simulation are intractable. 
Simcha Korenblit, Dvir Kafri, Wess C. Campbell, Rajibul Islam, Emily   E. Edwards, Zhe-Xuan Gong, Guin-Dar Lin, Luming Duan,...
quant-ph