Nuclear magnetic resonance for quantum computing: Techniques and recent achievements
Xin Tao1, Wang Bi-Xue1, Li Ke-Ren1, Kong Xiang-Yu1, Wei Shi-Jie1, Wang Tao1, Ruan Dong1, Long Gui-Lu1, 2, 3,
       

(color online) The work is to simulate the minimal honeycomb lattice on a torus. This torus only contains one plaquette, two vertices, and three edges. 1,2,3 are three edges which can be simulated by three qubits, respectively.[150]