Flux Qubits and Readout Device with Two Independent Flux Lines

Details Flux Qubits and Readout Device with Two Independent Flux Lines Flux Qubits and Readout Device with Two Independent Flux Lines

2005-01-27

arxiv.org/abs/cond-mat/0501679v2

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, higher quality figures available upon request. Submitted to PRL

Scientific paper

10.1103/PhysRevB.72.060506

We report measurements on two superconducting flux qubits coupled to a readout Superconducting QUantum Interference Device (SQUID). Two on-chip flux bias lines allow independent flux control of any two of the three elements, as illustrated by a two-dimensional qubit flux map. The application of microwaves yields a frequency-flux dispersion curve for 1- and 2-photon driving of the single-qubit excited state, and coherent manipulation of the single-qubit state results in Rabi oscillations and Ramsey fringes. This architecture should be scalable to many qubits and SQUIDs on a single chip.

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