Four-qubit device with mixed couplings.
نویسندگان
چکیده
We present the first experimental results on a device with more than two superconducting qubits. The circuit consists of four three-junction flux qubits, with simultaneous ferro- and antiferromagnetic coupling implemented using shared Josephson junctions. Its response, which is dominated by the ground state, is characterized using low-frequency impedance measurement with a superconducting tank circuit coupled to the qubits. The results are found to be in excellent agreement with the quantum-mechanical predictions.
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عنوان ژورنال:
- Physical review letters
دوره 96 4 شماره
صفحات -
تاریخ انتشار 2006