1.http://arxiv.org/abs/quant-ph/0610024
Topological Computation without Braiding
Authors: H. Bombin, M.A. Martin-Delgado
2.http://arxiv.org/abs/quant-ph/0609002
A simple nearest-neighbor two-body Hamiltonian system for which the ground state is a universal resource for quantum computation
Authors: Stephen D. Bartlett, Terry Rudolph
