Figure 1
From: Methodology for bus layout for topological quantum error correcting codes

Two-dimensional lattice of qubits (black dots). The dashed lines between qubits represent two-qubit couplings. The solid lines going through the qubits are TLRs. The squares at the end of the solid lines specify the starting and the ending points of the corresponding TLRs. (a) Set \(\mathcal{P}\) of two-qubit couplings required in a given quantum circuit. (b) TLR scheme that realizes every two-qubit coupling of (a). The two TLRs each contain more than two TQs.