What are the advantages of circuit quantum electrodynamics (circuitQED)?
One advantage is the possibility to make use of existing chip technology for the fabrication of our quantum bits and quantum bus. Once a single qubit is fabricated, it is not difficult to make many more qubits. In that way a potential quantum computer can be made in a way resembling the fabrication of modern microchips. The quantum electrodynamics aspect allows us to manipulate and control the interactions on a single photon level. Further,the coupling and read-out mechanisms can be understood in detail. In such a system it is possible to convert the localized quantum information of a qubit into a photon, which travels at the speed of light. One can therefore call these photons “flying qubits,” which transport the information over large distances.
