Why solid state qubits/ why superconducting qubits?
The apparent advantage of a solid-state approach is the usage of standard existing chip technology for fabrication. This technology is inherently scaleable, such that once we can make one qubit, it is not difficult to fabricate larger numbers. The challenge will be to provide a reliable and switchable coupling between all of these qubits. Our work provides a major step forward in this direction by introducing a coupling that is long range and not restricted to nearest neighbors.
