Coupling Josephson qubits via a current-biased information bus

Details Coupling Josephson qubits via a current-biased information bus Coupling Josephson qubits via a current-biased information bus

2004-02-27

arxiv.org/abs/cond-mat/0402678v2

Europhysics Letters 67, 1004 (2004)

Physics

Condensed Matter

Superconductivity

10 pages, 1 figure. submitted

Scientific paper

10.1209/epl/i2004-10149-x

Josephson qubits without direct interaction can be effectively coupled by sequentially connecting them to an information bus: a current-biased large Josephson junction treated as an oscillator with adjustable frequency. The coupling between any qubit and the bus can be controlled by modulating the magnetic flux applied to that qubit. This tunable and selective coupling provides two-qubit entangled states for implementing elementary quantum logic operations, and for experimentally testing Bell's inequality.

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