Quantum error correction with superconducting circuit based qubits

Is it better first scale-up and then correct or first correct and then scale-up?

University of Oulu, Finland

Abstract

Superconducting electric circuits have now qubits and operations with excellent fidelities. Unfortunately, this is not yet enough for the stringent requirements of quantum computation. To go beyond, one needs to realize quantum error correction. Which is the best way to reach it? Is it first correct errors in individual devices and then scale up or first scale up and then correct errors?