Quantum Computing, Fault Tolerance, Error Correction, Logical Qubits.
https://arxiv.org/abs/1402.4848, https://www.nature.com/articles/nature13171 2015 — Demonstration of a quantum error detection code using a square lattice of four superconducting qubits — Córcoles, Magesan, Srinivasan, Cross, Steffen, Gambetta, Chow https://www.nature.com/articles/ncomms7979 2015 —