Through these checks \u2014 and more subtle tweaks of the iffy qubits \u2014 you can also hide a reliable qubit throughout the square block\u2019s data-carrying qubits, not exactly here or there but sort of everywhere. As long as the iffy qubits keep the Minesweeper operations humming along smoothly, the hidden qubit stays safe and can be manipulated to perform operations. In this way, the surface code elegantly fuses many shoddy qubits into a single qubit that rarely errs.<\/p>\n