How does this advance from previous demonstrations of chip-based qubits?
So far, single qubit manipulations and interactions that couple neighboring qubits have been demonstrated. In this work, we introduce an on-chip quantum bus coupled to the superconducting qubits located on the same chip. With this quantum bus it is possible to couple arbitrary qubits over long distances. We also use the cavity to control and read-out the qubits’ states. In that way we are able to manipulate the qubits via only one single line, which reduces the complexity when coupling several qubits. The introduction of such a quantum bus provides the possibility of scalability to a network of multiple solid-state qubits.
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