Fault-Tolerant Exact State Transmission
  We show that a category of one-dimensional XY-type models may enable high-fidelity quantum state transmissions, regardless of details of coupling configurations. This observation leads to a fault- tolerant design of a state transmission setup. The setup is fault-tolerant, with specified thresholds, against engineering failures of coupling configurations, fabrication imperfections or defects, and even time-dependent noises. We propose the implementation of the fault-tolerant scheme using hard-core bosons in one-dimensional optical lattices. 
Zhao-Ming Wang, Lian-Ao Wu, Michele Modugno, Wang Yao, and Bin Shao
quant-ph