Quantum simulation of an extra dimension
  We present a general strategy to simulate a D+1-dimensional quantum system using a D-dimensional one. We analyze in detail a feasible implementation of our scheme using optical lattice technology. The simplest non-trivial realization of a fourth dimension corresponds to the creation of a bivolume geometry. We also propose single- and many-particle experimental signatures to detect the effects of the extra dimension. 
O. Boada, A. Celi, M. Lewenstein and J. I. Latorre
cond-mat.stat-mech cond-mat.other hep-th