Trapped ions in optical lattices for probing oscillator chain models
  We show that a chain of trapped ions embedded in microtraps generated by an optical lattice can be used to study oscillator models related to dry friction and energy transport. Numerical calculations with realistic experimental parameters demonstrate that both static and dynamic properties of the ion chain change significantly as the optical lattice power is varied. Finally, we lay out an experimental scheme to use the spin degree of freedom to probe the phase space structure and quantum critical behavior of the ion chain. 
Thaned Pruttivarasin, Michael Ramm, Ishan Talukdar, Axel Kreuter,   Hartmut Haeffner
quant-ph