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. 2017 Oct 20;3(10):e1701074. doi: 10.1126/sciadv.1701074

Fig. 1. Graphical representation of the logical operators and stabilizers defining the [[4, 2, 2]] code on physical qubits 1 to 4.

Fig. 1

The structure of the logical operators X and Z for the two encoded qubits La and Lb, and for the two stabilizers Sx and Sz, is defined in Eqs. 3 and 4.