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Yale links superconducting qubits through a microwave cavity

Sep 13, 2007

Johannes Majer and colleagues use a microwave cavity as a quantum bus between superconducting qubits on opposite sides of a chip. They switch the effective coupling and demonstrate coherent transfer of quantum states.

Why it matters

A shared resonator lets separated qubits exchange information, extending superconducting circuits beyond directly connected neighbors.

Johannes Majer · Robert Schoelkopf · Yale

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Related

• Yale couples a superconducting qubit to a single microwave photon (Jul 13, 2004)
• Yale physicists introduce the transmon, the qubit later used by IBM and Google (Feb 28, 2007)