Long-range and selective coupler for superconducting flux qubits

Details Long-range and selective coupler for superconducting flux qubits Long-range and selective coupler for superconducting flux qubits

2007-05-10

arxiv.org/abs/0705.1405v2

Physics

Condensed Matter

Superconductivity

8 pages, 4 figures

Scientific paper

10.1063/1.2756275

We propose a qubit-qubit coupling scheme for superconducting flux quantum bits (qubits), where a quantized Josephson junction resonator and microwave irradiation are utilized. The junction is used as a tunable inductance controlled by changing the bias current flowing through the junction, and thus the circuit works as a tunable resonator. This enables us to make any qubits interact with the resonator. Entanglement between two of many qubits whose level splittings satisfy some conditions, is formed by microwave irradiation causing a two-photon Rabi oscillation. Since the size of the resonator can be as large as sub-millimeters and qubits interact with it via mutual inductance, our scheme makes it possible to construct a quantum gate involving remote qubits

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